An engaging member is formed by a binding member and a body member separate from the binding member being combined. The binding member has a belt portion that winds around an outer periphery of a wire routing material, and a buckle portion capable of fixing both ends of the belt portion. The body member includes, as an engaging portion for assembly into a vehicle body, a pillar portion to be inserted in a fixing hole of the vehicle body, and an elastic latch piece that is inserted, together with the pillar portion, in the fixing hole, is elastically deformed so as to approach the pillar portion when inserted, is elastically restored in the inserted state, is latched by and against a peripheral portion of the fixing hole. The pillar portion has a buckle storing portion in which the buckle portion is stored.