On 28 August 2009, Robben moved to Bayern Munich for around €25 million. He was given the number 10 shirt, last worn by his fellow Dutchman, Roy Makaay. His debut came the day after. He came on as a half-time substitute against Wolfsburg, scored two goals, and helped his team beat last season's champions in Bayern's first win of the 2009–10 season. On 9 March 2010, Robben scored the deciding goal in Bayern's 2–3 defeat (4–4 on aggregate over two legs) against Fiorentina, taking them through to the quarter finals of the 2009–10 UEFA Champions League on away goals.
On 7 April 2010, Robben sent Bayern Munich into the semi-finals of the UEFA Champions League with a stunning volley against Manchester United from the edge of the area into the corner of the net. The game ended 3–2 to United (4–4 on aggregate) with Bayern advancing again due to away goals.
On 17 April 2010, he scored his first hat-trick in the Bundesliga against Hannover 96 in the Allianz Arena. The game ended 7–0 to the Bavarians. On 8 May 2010, he won his first Bundesliga title with Bayern Munich after scoring two goals in their 3–1 victory over Hertha BSC, finishing as Bayern's top scorer in the process.
A week later, Bayern played in the DFB-Pokal Final against the previous champions of the tournament, Werder Bremen, in Berlin's Olympiastadion. Bayern won the game by 4–0; Robben scored the first of those four goals from a penalty kick. Robben thus helped the Bavarians achieve their fifteenth DFB-Pokal title. On 25 May 2010, Robben was named Footballer of the Year in Germany for the year 2010. He won the election by attaining a record 72.1% of the vote and was the first Dutch person to win this election.
On 7 April 2010, Robben sent Bayern Munich into the semi-finals of the UEFA Champions League with a stunning volley against Manchester United from the edge of the area into the corner of the net. The game ended 3–2 to United (4–4 on aggregate) with Bayern advancing again due to away goals.
On 17 April 2010, he scored his first hat-trick in the Bundesliga against Hannover 96 in the Allianz Arena. The game ended 7–0 to the Bavarians. On 8 May 2010, he won his first Bundesliga title with Bayern Munich after scoring two goals in their 3–1 victory over Hertha BSC, finishing as Bayern's top scorer in the process.
A week later, Bayern played in the DFB-Pokal Final against the previous champions of the tournament, Werder Bremen, in Berlin's Olympiastadion. Bayern won the game by 4–0; Robben scored the first of those four goals from a penalty kick. Robben thus helped the Bavarians achieve their fifteenth DFB-Pokal title. On 25 May 2010, Robben was named Footballer of the Year in Germany for the year 2010. He won the election by attaining a record 72.1% of the vote and was the first Dutch person to win this election.
The 2010–11 season started badly for Robben, after medical tests confirmed that his hamstring had not properly healed and that he would be out for two months. Bayern chairman Karl-Heinz Rummenigge stated that "Of course, Bayern Munich are very angry" with the Dutch FA, and would be seeking compensation from them, continuing "Once again we must pay the bill as a club after a player is seriously injured playing for a national team."On 15 January 2011, he returned to first team action, coming on as a substitute in the 1–1 away draw with VfL Wolfsburg.
Robben was nominated for the "UEFA Champions League Best Midfielder", but this went to his international compatriot Wesley Sneijder. He has also been nominated for the prestigious Ballon d'Or award, and the FIFA Puskás Award, which goes to the best goal of the year, and he has also been nominated for FIFA’s "FIFPro World XI 2010" squad, thanks to his fantastic season with Bayern Munich.
In the second leg of the semi-finals of the 2011–12 UEFA Champions League, against his former club Real Madrid which was now managed by José Mourinho (who had been his manager at Chelsea), after Bayern fell behind 2–0, Robben converted a penalty to level the tie at 3–3. Bayern advanced to the final after winning the resulting penalty shootout.
On 3 May 2012 it was reported that Robben has signed a new contract with Bayern which will last till 2015.
Robben had an extra-time penalty saved by former teammate Petr Čech in the 2012 UEFA Champions League Final at the Allianz Arena against Chelsea. Had he scored, Bayern Munich would have led Chelsea 2–1. However the match ended in a penalty shootout which Chelsea won. That was the fourth major cup final that he had been on the losing side during the last two years (World Cup final, two Champions League finals and the DFB Pokal). Three days later in the same stadium while playing as a second half substitute for the Netherlands in a friendly against Bayern Munich, he was jeered by some disgruntled Bayern Munich fans every time he touched the ball (due to his penalty miss in the Champions League final, and as he did not play on Bayern's side during that match due to a decision taken by Netherlands coach Bert van Marwijk). The match had been organized to compensate Bayern, since Robben aggravated an injury playing for the Netherlands at the 2010 World Cup, and went on to miss several months of the 2010–11 season.
In the 2012–13 season, Robben had started the season on the bench, as manager Jupp Heynckes preferred to start Thomas Müller on the right wing, with Toni Kroos at the attacking midfielder position. Robben had played through the season as a substitute, but earned his chance to start again after Kroos was injured during the Champions League tie against Juventus. He started on the right wing for the rest of the season, having moved Müller back to the middle. Robben started against Borussia Dortmund in the quarterfinals of the DFB-Pokal and scored the game's lone goal in the 43rd minute. In the Champions League semi-final against FC Barcelona, Robben started both games and scored in both games, including the go-ahead goal in the second leg. Bayern would then go on to return to the Final. Robben atoned for his penalty miss the previous season by setting up teammate Mario Mandžukić's goal to open the scoring in the 60th minute then netting an 89th minute winner in a 2–1 victory over Borussia Dortmund to give Bayern their fifth European Cup.During the presentation he was named Man of the Match by UEFA.
Robben scored his first goals of the 2013–14 season in the 2013 DFL-Supercup, where Bayern were beaten 4–2 by Borussia Dortmund.[62] On 9 August 2013, his opening goal helped Bayern to a 3–1 win over Borussia Mönchengladbach in their first match of the Bundesliga campaign. On 17 September, he scored in Bayern's Champions League opener against CSKA Moskva at the Allianz Arena.[64] He went on to score two further goals during the Champions League group stage; in away wins against Manchester City and CSKA as Bayern finished as group winners. On 23 November, Robben was one of three scorers as Bayern beat title rivals Borussia Dortmund 3–0 at the Westfalenstadion. On 4 December, Robben was substituted with a deep cut on his right knee in a 2–0 DFB-Pokal win away to FC Augsburg which prevented him from taking part in the 2013 FIFA Club World Cup.
On 1 March 2014, Robben scored a hat-trick in Bayern's 5–1 win over FC Schalke 04. On 19 March, he signed a contract extension with Bayern, which will keep him at the club until 2017. On 9 April, Robben scored Bayern's third goal in a 3–1 Champions League quarter-final against Manchester United, to secure qualification to the semi-finals.On 17 May, Robben scored Bayern's opening goal in a 2–0 extra-time defeat of Borussia Dortmund in the 2014 DFB-Pokal Final, giving him his third league and cup double in five seasons with the club. His goal made him the first player to score in three separate DFB-Pokal finals. On 13 July, after winning the third place match at the 2014 FIFA World Cup, Louis van Gaal invited Robben to follow him to Manchester United, but the latter ruled out the move.
In Bayern's opening match of the 2014–15 Bundesliga season, Robben scored one goal and assisted the other as the team defeated VfL Wolfsburg 2–1 on on 22 August 2014. On 1 November, he scored the winning goal from a penalty kick against Borussia Dortmund in Der Klassiker. On 16 December 2014, Robben scored his 100th competitive goal for Bayern Munich in a home match against SC Freiburg.
On 21 February 2015, Robben scored twice in a 6–0 win against SC Paderborn 07, giving him the record of having scored against every Bundesliga team he had faced. He ended 2014–15 alongside teammate Robert Lewandowski as joint second-top goalscorer in the Bundesliga with 17 goals. This was in spite of the player missing the last two months of the season through injury.
Robben was nominated for the "UEFA Champions League Best Midfielder", but this went to his international compatriot Wesley Sneijder. He has also been nominated for the prestigious Ballon d'Or award, and the FIFA Puskás Award, which goes to the best goal of the year, and he has also been nominated for FIFA’s "FIFPro World XI 2010" squad, thanks to his fantastic season with Bayern Munich.
In the second leg of the semi-finals of the 2011–12 UEFA Champions League, against his former club Real Madrid which was now managed by José Mourinho (who had been his manager at Chelsea), after Bayern fell behind 2–0, Robben converted a penalty to level the tie at 3–3. Bayern advanced to the final after winning the resulting penalty shootout.
On 3 May 2012 it was reported that Robben has signed a new contract with Bayern which will last till 2015.
Robben had an extra-time penalty saved by former teammate Petr Čech in the 2012 UEFA Champions League Final at the Allianz Arena against Chelsea. Had he scored, Bayern Munich would have led Chelsea 2–1. However the match ended in a penalty shootout which Chelsea won. That was the fourth major cup final that he had been on the losing side during the last two years (World Cup final, two Champions League finals and the DFB Pokal). Three days later in the same stadium while playing as a second half substitute for the Netherlands in a friendly against Bayern Munich, he was jeered by some disgruntled Bayern Munich fans every time he touched the ball (due to his penalty miss in the Champions League final, and as he did not play on Bayern's side during that match due to a decision taken by Netherlands coach Bert van Marwijk). The match had been organized to compensate Bayern, since Robben aggravated an injury playing for the Netherlands at the 2010 World Cup, and went on to miss several months of the 2010–11 season.
In the 2012–13 season, Robben had started the season on the bench, as manager Jupp Heynckes preferred to start Thomas Müller on the right wing, with Toni Kroos at the attacking midfielder position. Robben had played through the season as a substitute, but earned his chance to start again after Kroos was injured during the Champions League tie against Juventus. He started on the right wing for the rest of the season, having moved Müller back to the middle. Robben started against Borussia Dortmund in the quarterfinals of the DFB-Pokal and scored the game's lone goal in the 43rd minute. In the Champions League semi-final against FC Barcelona, Robben started both games and scored in both games, including the go-ahead goal in the second leg. Bayern would then go on to return to the Final. Robben atoned for his penalty miss the previous season by setting up teammate Mario Mandžukić's goal to open the scoring in the 60th minute then netting an 89th minute winner in a 2–1 victory over Borussia Dortmund to give Bayern their fifth European Cup.During the presentation he was named Man of the Match by UEFA.
Robben scored his first goals of the 2013–14 season in the 2013 DFL-Supercup, where Bayern were beaten 4–2 by Borussia Dortmund.[62] On 9 August 2013, his opening goal helped Bayern to a 3–1 win over Borussia Mönchengladbach in their first match of the Bundesliga campaign. On 17 September, he scored in Bayern's Champions League opener against CSKA Moskva at the Allianz Arena.[64] He went on to score two further goals during the Champions League group stage; in away wins against Manchester City and CSKA as Bayern finished as group winners. On 23 November, Robben was one of three scorers as Bayern beat title rivals Borussia Dortmund 3–0 at the Westfalenstadion. On 4 December, Robben was substituted with a deep cut on his right knee in a 2–0 DFB-Pokal win away to FC Augsburg which prevented him from taking part in the 2013 FIFA Club World Cup.
On 1 March 2014, Robben scored a hat-trick in Bayern's 5–1 win over FC Schalke 04. On 19 March, he signed a contract extension with Bayern, which will keep him at the club until 2017. On 9 April, Robben scored Bayern's third goal in a 3–1 Champions League quarter-final against Manchester United, to secure qualification to the semi-finals.On 17 May, Robben scored Bayern's opening goal in a 2–0 extra-time defeat of Borussia Dortmund in the 2014 DFB-Pokal Final, giving him his third league and cup double in five seasons with the club. His goal made him the first player to score in three separate DFB-Pokal finals. On 13 July, after winning the third place match at the 2014 FIFA World Cup, Louis van Gaal invited Robben to follow him to Manchester United, but the latter ruled out the move.
In Bayern's opening match of the 2014–15 Bundesliga season, Robben scored one goal and assisted the other as the team defeated VfL Wolfsburg 2–1 on on 22 August 2014. On 1 November, he scored the winning goal from a penalty kick against Borussia Dortmund in Der Klassiker. On 16 December 2014, Robben scored his 100th competitive goal for Bayern Munich in a home match against SC Freiburg.
On 21 February 2015, Robben scored twice in a 6–0 win against SC Paderborn 07, giving him the record of having scored against every Bundesliga team he had faced. He ended 2014–15 alongside teammate Robert Lewandowski as joint second-top goalscorer in the Bundesliga with 17 goals. This was in spite of the player missing the last two months of the season through injury.