<p>[Problem] To provided a window regulator including a wire sag compensating mechanism which prevents an outer tube from being disengaged from guide means. [Means for Resolution] A wire sag compensating mechanism including an outer tube 201 arranged between the vicinity of a drum 65 and the vicinity of a wire guide member for allowing passage of a wire 71 therethrough and fixed at the end on the side of the wire guiding member to a member where the wire guide member is provided; tube holding portion 207 provided on a member on which the drum 65 is provided for allowing movable engagement of the drum 65 side of the outer tube 201 and guiding the drum 65 side of the outer tube 201 in the axial direction of the outer tube 201; a spring 209 for urging the drum 65 side of the outer tube 201 in the direction away from the drum 65; and a disengagement restricting means (projections 213, elongated holes 211) for restricting the outer tube 201 from being disengaged from the tube holding portion 207 is provided.</p>
