Patent ID: 7557973

Claim:
An optical scanning device comprising: a light source member for irradiating a light beam; a scanning optical system for allowing the light beam to deflectively scan a surface to be scanned; a housing for supporting the light source member and the scanning optical system, the housing including a first elevation wall and a second elevation wall facing the first elevation wall; a first frame facing the first elevation wall of the housing or a part near the first elevation wall; a second frame facing the second elevation wall of the housing; a first support portion for supporting the first elevation wall or the part near the first elevation wall with the first frame at two points; a second support portion for supporting the second elevation wall with the second frame at a single point; a forcible contact mechanism for generating a biasing force for urging the first elevation wall onto the first frame; and an adjusting mechanism provided in the second support portion for adjusting a deviation of the housing over a horizontal plane.