A connector which makes it possible to prevent an object to be connected from being easily removed therefrom. When a flexible printed wiring board is inserted into an insertion portion from an insertion slot of a housing, abutment portions of an operation member are pushed and rotated by the flexible printed wiring board, and are moved in a direction away from the insertion portion, and an operation portion of the operation member is rotated, whereby movable arm portions of first contacts and second contacts are moved in the direction away from the insertion portion. When the flexible printed wiring board is inserted to a predetermined position in the insertion portion, locking portions of the abutment portions are inserted in receiving portions of the housing through receiving portions of the flexible printed wiring board, and the movable arm portions are moved in a direction approaching to the insertion portion.