| Mika Saiki | |
| Nickname: | Teru |
| Nationality: | Japanese |
| Birth Date: | 25 September 1972 |
| Birth Place: | Matsuyama, Ehime, Japan |
| Nationalyears: | 1995–1996 |
| Weight: | 63kg (139lb) |
| Currentteammate: | Chiaki Kusuhara |
| Teamnumber: | 11 |
| Medaltemplates-Expand: | yes |
| Medaltemplates-Title: | Medal record |
is a retired Japanese beach volleyball and indoor volleyball player.
Saiki competed at the 1996 Summer Olympics in volleyball. She then competed at the 2000 Summer Olympics and the 2008 Summer Olympics in beach volleyball.