An electrical connector module, includes a first connecting part and a second connecting part. The first connecting part includes a main body and a pair of protrusion portions. The second connecting part includes a base seat, a receiving portion on the base body; and a pair of latching assemblies. The latching assembly includes a pair of first blocking members, a pair of second blocking members and a latching member. The latching member is located between the pair of first blocking members and the pair of second blocking members. The latching member includes a base body, a latching portion protruding from the base body, and a pair of cam portions on the base body, each cam portion is rotatably retained between one first blocking member and one second blocking member.