OPTICAL SCANNING DEVICE AND IMAGE FORMING APPARATUS INCLUDING THE SAME

An optical scanning device irradiates an image carrier with laser light to form an electrostatic latent image. The optical scanning device includes a casing, a transmissive member, a wire-shaped member, a driving portion, a guide rail, a cleaning holder, a cleaning member, and a stopper. The cleaning member is fixed to the cleaning holder and cleans the transmissive member by sliding with respect to the transmissive member along with movement of the cleaning holder. The stopper is disposed on one side of the guide rail in an extending direction of the guide rail and restricts the movement of the cleaning holder. Another side of the guide rail in the extending direction of the guide rail is open in the extending direction of the guide rail.