| Clcs: | yes |
| Year: | 2017 |
| Stage1champion: | Yokohama DeNA BayStars (2) |
| Stage1champion Games: | 73–65–5 (.529), 14.5 GB |
| Stage1runnerup: | Hanshin Tigers (1) |
| Stage1runnerup Games: | 78–61–4 (.561), 10 GB |
| Date1: | October 14–17 |
| Stage2champion: | Yokohama DeNA BayStars (4) |
| Stage2champion Manager: | Alex Ramírez |
| Stage2champion Games: | 73–65–5 (.529), 14.5 GB |
| Stage2runnerup: | Hiroshima Toyo Carp (2) |
| Stage2runnerup Games: | 88–51–4 (.633), 10 GA |
| Date2: | October 18–24 |
| Mvp: | José López (DeNA) |
| Previous Series: | 2016 Central League Climax Series |
| Previous Year: | 2016 |
| Next Series: | 2018 Central League Climax Series |
| Next Year: | 2018 |
The 2017 Central League Climax Series (CLCS) was a post-season playoff consisting of two consecutive series that determined who would represent the Central League in the Japan Series. The First Stage was a best-of-three series and the Final Stage was a best-of-six with the top seed being awarded a one-win advantage. The winner of the series advanced to the 2017 Japan Series, where they competed against the 2017 Pacific League Climax Series winner. The top three regular-season finishers played in the two series. The CLCS began with the first game of the First Stage on October 14 and ended with the final game of the Final Stage on October 24.
† This game was originally scheduled for Monday, October 16, but postponed one day due to weather.
† Game 4 was originally scheduled for Saturday, October 21, but was postponed for two days due to weather, forcing Game 5 to be subsequently postponed two days as well.