| Clcs: | yes |
| Year: | 2018 |
| Stage1champion: | Yomiuri Giants (2) |
| Stage1champion Games: | 67–71–5 (.486), 13.5 GB |
| Stage1runnerup: | Tokyo Yakult Swallows (0) |
| Stage1runnerup Games: | 75–66–2 (.532), 7 GB |
| Date1: | October 13–14 |
| Stage2champion: | Hiroshima Toyo Carp (4) |
| Stage2champion Games: | 82–59–2 (.582), 7 GA |
| Stage2runnerup: | Yomiuri Giants (0) |
| Stage2runnerup Manager: | Yoshinobu Takahashi |
| Stage2runnerup Games: | 67–71–5 (.486), 13.5 GB |
| Date2: | October 17–19 |
| Mvp: | Ryosuke Kikuchi (Carp) |
| Previous Series: | 2017 Central League Climax Series |
| Previous Year: | 2017 |
| Next Series: | 2019 Central League Climax Series |
| Next Year: | 2019 |
The 2018 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 2018 Japan Series, where they competed against the 2018 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 13.