A window regulator includes: a carrier piece attached to a window glass; a drive wire connected to the carrier piece and configured to lift and lower the carrier piece; and a wire end connected to an end portion of the drive wire. The carrier piece has a wire end housing portion configured to house the wire end, a wire insertion groove communicating with the wire end housing portion, and a wire retaining portion extending at an upper end of the wire insertion groove. The drive wire is routed in the wire insertion groove. An upper side of the wire insertion groove includes an opening which opens in an upper direction crossing a routing direction of the drive wire. The wire retaining portion prevents the drive wire from coming out of the wire insertion groove by contacting the drive wire.