| Cosmonaut | |
| Type: | studio |
| Artist: | Bump of Chicken |
| Cover: | Bump of Chicken - Cosmonaut.png |
| Released: | December 15, 2010 |
| Recorded: | 2009–2010 |
| Genre: | J-pop, rock |
| Length: | 79 minutes |
| Label: | Toy's Factory (TFCC-86347) |
| Prev Title: | Present from You |
| Prev Year: | 2008 |
| Next Title: | Ray |
| Next Year: | 2014 |
Cosmonaut is the sixth studio album by Bump of Chicken, released on December 15, 2010. The album features the singles "R.I.P./Merry Christmas" (without "Merry Christmas"), "Happy", "Mahō no Ryōri ~Kimi Kara Kimi e~", and "Uchūhikōshi e no Tegami/Motorcycle".