It is aimed to provide a connector capable of improving the reliability of connection detection. A connector is provided with a first housing and a second housing connectable to each other, a detector arranged movably to a standby position and a detection position with respect to the first housing, the detector being allowed to move to the detection position when the first and second housings are connected properly, and a biasing member accommodated in either one of the first and second housings. The biasing member accumulates a biasing force by being pressed by the detector moving toward the detection position.