A window regulator includes a carrier plate, a guide rail, an ascending-side wire and a descending-side wire, a driving portion, and a turnaround portion. The driving portion includes a rotating drum, a reducer, and a driving motor including a yoke portion that is arranged to be adjacent to one side of the reducer in an orthogonal direction orthogonal to the ascending/descending direction. The guide rail is arranged so as to in the orthogonal direction overlap only the ascending-side wire fed out from a first wire feeding-out position at the one side of the rotating drum in the orthogonal direction toward the turnaround portion between the ascending-side wire and the descending-side wire fed out from a second wire feeding-out position at an other side of the rotating drum in the orthogonal direction toward the carrier plate.