| Eijiro Ai | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 29 September 1964 |
| Birth Place: | Inashiki District, Ibaraki, Japan |
| Teams: | As player
As coach |
is a former Japanese Nippon Professional Baseball pitcher. He played for the Yakult Swallows from 1985 to 1989, and the Lotte Orions/Chiba Lotte Marines in 1991 and 1992.