Patent ID: 8106935

Claim:
An optical scanning apparatus, comprising: a light source configured to emit a light beam which scans an object to be scanned; a light source retainer configured to retain the light source; a holder including an engaging portion configured to detachably hold the light source retainer in an optical axis direction of the light source; and a first biasing member configured to bias the light source retainer against the engaging portion of the holder in a direction perpendicular to the optical axis direction so that the light source retainer is pressed against the engaging portion of the holder, wherein a contact position where the light source retainer contacts the first biasing member in the optical axis direction is within an engaging area where the engaging portion of the holder and the light source retainer engage in the optical axis direction, the light source retainer includes a protrusion formed on a surface thereof, the protrusion protruding from substantially a center of the engaging area, and the first biasing member is arranged to press against the protrusion.