A connector assembly, for electrically connecting electrical cables 7 to a test head 4, comprises a plurality of types of cable side connectors 8 respectively attached to one end of the electrical cable 7; and a intermediate connector 6 to which the plurality of types of cable side connectors 8 are connected in a detachable manner, and the intermediate connector 6 having a first engagement part 501 having a shape with which all types of cable side connectors 8 can be engaged and an output terminal 602 able to be engaged with a test head side connector 41 electrically connected to a pin electronics board of the test head 4.