| Union of Communist Militants | |
| Native Name: | اتحاد مبارزان کمونیست |
| Native Name Lang: | fa |
| Colorcode: | Red |
| Founded: | 1979 |
| Founder: | Mansoor Hekmat |
| Successor: | Communist Party of Iran |
| Dissolved: | 1983 |
| Ideology: | Maoism |
| Country: | Iran |
| Position: | Far-left |
Union of Communist Militants (fa|اتحاد مبارزان کمونیست, abbreviated EMK Persian: امک) was an Iranian communist group. It was led by Mansoor Hekmat. Hekmat founded the group in December 1978. The organization took part in the Iranian Revolution of 1979 - marked by the creation of workers' councils (shoras).
Because of mounting repression in Iran, the organisation sought refuge in Kurdistan in 1981. In Kurdistan, the organization merged with a Kurdish group of Maoist roots, Komala Party of Iranian Kurdistan. Together, they formed the Communist Party of Iran (CPI) in September 1983.[1]