Abstract: A window regulator includes: a guide rail includes a rail main body part, an insert-through part provided to one end of the rail main body part and inserted through a housing, and a locking tab provided to the rail main body part. The housing includes a housing part housing the insert-through part, an engaging part engaging with a tip of the locking tab, and a guide part configured to guide the tip of the locking tab to the engaging part when the tip of the locking tab is brought into contact with the guide part. The engagement of the locking tab and the engaging part restricts movement of the housing in a direction in which the tension of the wire for raising and the wire for lowering decreases.