The present invention relates to an underground distribution cable support device for an electric power conduit for an apartment house and, more particularly, to an underground distribution cable support device for an apartment house, capable of installing the upper and lower ends of an angle supporter (20), an angle control channel (30), an angle connection channel (40), an upper hinge plate (37, 38), a lower hinge plate (47, 48), a hinge pin (50), a position adjustment unit (60), a coupling bolt (70), and a nut (72) which is combined with the coupling bolt (70).COPYRIGHT KIPO 2016