A window regulator for a vehicle, includes a slider fixed to a slide windowpane which moves up and down in a vehicle door; a guide rail which is fixed to the door panel, extends in an up/down direction of the slide windowpane and supports the slider; a wire orientation changing member provided the guide rail; a drive wire which is wound around the wire orientation changing member, wherein the drive wire moves up and down with the slider; a drive drum which moves the drive wire up and down; and a slide contact portion which is provided on the guide rail, extends in the up/down direction and is greater in length than the slider in the up/down direction, wherein the slider slides on the slide contact portion when the slider moves up and down.