The 2017–18 FC Bayern Munich season is the 118th season in the football club's history and 53rd consecutive and overall season in the top flight of German football, the Bundesliga, having been promoted from the Regionalliga in 1965. Bayern Munich also are participating in this season's edition of the domestic cup, the DFB-Pokal, and the premier continental cup competition, the UEFA Champions League. Bayern are the reigning Bundesliga champions, and therefore also are participating in the German super cup, the DFL-Supercup. This is the 13th season for Bayern in the Allianz Arena, located in Munich, Bavaria, Germany. The season covers a period from 1 July 2017 to 30 June 2018.

In the previous season, Bayern won a record-setting fifth consecutive and 26th overall Bundesliga title, and 27th German title. They also won the DFL-Supercup, beating Borussia Dortmund. Bayern Munich were knocked out of the DFB-Pokal in the semi-finals by Borussia Dortmund, and were knocked out of the UEFA Champions League in the quarter-finals by Real Madrid.

On 15 January 2017, Bayern announced the signing of Niklas Süle and Sebastian Rudy, both from 1899 Hoffenheim. Süle was signed for an undisclosed fee, with a five-year contract lasting until 2022. Rudy joined on a free transfer, signing a three-year contract until 2020. On 7 February, Bayern captain Philipp Lahm confirmed his retirement at the end of the 2016–17 season. On 9 March, Xabi Alonso announced his retirement at the end of the 2016–17 campaign. On 14 March, Bayern announced that youth player Marco Friedl signed his first professional contract, lasting four years until 2021. On 27 April, Bayern announced the permanent signing of Kingsley Coman in the summer for €21 million, previously on loan from Juventus, with a contract running for three years until 2020. On 12 May, Bayern announced that Holger Badstuber, on loan to Schakle 04, would be released on a free transfer in the summer following the end of his contract on 30 June. Also on 12 May, Bayern announced that Juventus permanently signed Medhi Benatia for €17 million, on loan from Bayern since the start of the 2016–17 season.Gianluca Gaudino will return to the club on 30 June, following his loan spell at FC St. Gallen. On 19 May, it was announced that goalkeeper Tom Starke would retire at the end of the 2016–17 season.

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