A combination connector consists of: a first holding member for holding a plurality of female connectors, a second holding member for holding a plurality of male connectors and a lever rotatably mounted on the first holding member or the second holding member. The lever has cam grooves to be engaged with pins projecting from the first holding member or the second holding member. In this construction, the lever is rotated with the pin engaging the cam groove so as to engage the female connectors held by the first holding member and the male connectors held by the second holding member with each other and connect the first holding member and the second holding member with each other.