| Aiō Mototsuna | |
| Native Name: | 相合元綱 |
| Native Name Lang: | jpn 相合元綱 |
| Death Date: | May 11, 1542 |
| Birth Place: | Aki Province |
| Nickname: | Mōri Mototsuna (毛利元綱) |
| Allegiance: | Mōri clan |
| Relations: | Father: Mōri Hiromoto Brother: Mori Motonari |
| Rank: | Daimyō (Lord) |
| Unit: | Mōri clan |
was a brother of the famous Mōri Motonari and son of Mōri Hiromoto.In 1524, a failed conspiracy by Sakagami Sosuke and other vassals under Motonari sought to murder him and elevate Mototsuna to replace Motonari as leader.He later died of a cold.