A connector module includes a single port connector and a circuit board capable of assembling with a multi-ports connector. The single port connector includes a receiving room and a number of first fixing pins formed at opposite sides of the receiving room along a longitudinal direction of the receiving room. The first fixing pins at each side of the receiving are arranged in a same way. The multi-ports connector includes at least two of the receiving room and the first fixing pins formed at opposite sides of each receiving room. The circuit board defines a group of first fixing holes corresponding to the first fixing pins formed at each side of the receiving rooms of the multi-ports connector. The single port connector is mounted on the circuit board by selectively inserting the first fixing pins into every two adjacent groups of the first fixing holes.