Geom Mojam (?–670) was the military leader of a short-lived movement to restore Goguryeo after its fall to Silla in the later 7th century CE.
After the kingdom fell to Tang and Silla in 668, he kindled an opposition movement in the Taedong River valley and in 670 established Anseung (안승, 安勝, another source has it as Ansun, 안순, 安舜) as the new King of Goguryeo.
One source gives Geom's birthplace as Surimseong (수림성, 水臨城), while the Samguk Sagi (“Annals of Silla”/King Munmu 10/Month 6) relates that he was a native of the walled city of Yeongnim (location unknown).
The Samguk Sagi relates how following the fall of Goguryeo Geom departed from Gungmo fortress (궁모성, 窮牟城) and arriving to the south of the Pae River he met and killed several Tang officials and the monk Fa An (法安) before heading for Silla territory.
After placing Anseung on the throne, Geom dispatched the sohyeong (소형, 小兄) Dasik (다식, 多式) to Silla to request armed assistance and recognition from that kingdom.