A window regulator comprises: a guide rail; a slider base that is supported on the guide rail so as to be able to freely move vertically; a drive wire that is connected to the slider base; a wire guide that is supported on one end of the guide rail and that has, in a position offset from the guide rail in the vehicle width direction, a winding unit by which the drive wire is wound; and a drive unit that raises and lowers the slider base via the drive wire. The wire guide is supported on the guide rail by at least a retaining unit and a pressing unit. The retaining unit engages with the guide rail so as to prevent the wire guide from disengaging from the guide rail in the vehicle width direction, and the pressing unit engages with the guide rail so as to allow the guide rail to be pressed toward the other end of the guide rail. The pressing unit is positioned more toward the other end than the retaining unit and is formed in a position offset closer to the winding unit side than the retaining unit in the vehicle width direction. Thus, it is possible to provide a window regulator for which "bowing deformation" of the guide rail does not easily occur even if thinning or cross sectional deformation of the guide rail progresses.