A window regulator comprises a carrier plate, a drive unit, a raising cable, a lowering cable, and a guide rail. The carrier plate is attached to a lower part on a first edge part side of the windowglass. The drive unit is capable of raising and lowering the windowglass via the carrier plate. The drive unit and the carrier plate are coupled by the raising cable and the lowering cable. The guide rail mates with the carrier plate so as to guide the carrier plate and constrain the operation of the windowglass to directions that intersect movement directions of the carrier plate.