The present disclosure provides a connector and a connector assembly. The connector includes a plurality of guiding blocks and at least one connection port. Each of the plurality of guiding blocks has a first surface, a second surface opposite to the first surface, and a third surface adjacent to the first surface and the second surface. A first guiding groove is disposed on the first surface. A second guiding groove is disposed on the second surface. An engaging hole is inserted between the first guiding groove and the second guiding groove. A locking hole is disposed on the third surface. Each of the at least one connection port is disposed on two adjacent guiding blocks of the plurality of guiding blocks. The connector may be used with a mating connector having fixing bars to engage in the guiding grooves or alternatively with a mating connector having locking pieces to engage in the locking holes.