Window regulator and guide rail attaching method

A window regulator, comprising:

• a guide rail provided along an ascending/descending direction of a window glass of a vehicle;
• a carrier plate that supports the window glass and is slidably attached to the guide rail;
• a wire to pull the carrier plate;
• and
• a rotating drum to take up and feed out the wire by rotating;
• and
• wherein the guide rail comprises a flat plate portion extending in the ascending/descending direction, and a side plate portion rising from the flat plate portion, and
• wherein the carrier plate comprises an insertion portion into which the guide rail is inserted, a first insertion guide wall extending from a first inner surface of the insertion portion toward the near side in an insertion direction so as to protrude from an edge of the insertion portion on the near side in the insertion direction and guiding the flat plate portion to the insertion portion, and a second insertion guide wall extending from a second inner surface of the insertion portion toward the near side in the insertion direction so as to protrude from the edge of the insertion portion on the near side in the insertion direction and guiding the side plate portion to the insertion portion.