| Yamanashi Science Museum | |
| Native Name: | 山梨県立科学館 |
| Location: | Atago-cho, Kōfu, Yamanashi Prefecture, Japan |
| Type: | Astronomy and technology museum |
is a science museum located in Kōfu, Yamanashi Prefecture, Japan. The museum specializes in astronomy, and technology.
The museum was originally located at Kofu Castle but was moved to its present location in 1998 when reconstruction of Kofu Castle began.
The museum includes a planetarium, astronomical observatory dome, exhibition room, experience study room, and a library. The museum is located approximately 25 minutes walk from north exit of Kōfu Station.