Union of Iranian Communists (Sarbedaran lit. the head-on-gallow mass) (UIC(S); Persian: اتحادیه کمونیستهای ایران) was a Maoist organization in Iran. The UIC(S) was formed in 1976 after the alliance of a number of Maoist groups carrying out military actions within Iran. The group prepared an insurrection starting in 1981, but it was dismantled by 1982.