Optical scanning device, image forming apparatus

An optical scanning device, comprising:

• an optical scanning member configured to scan a light beam;
• a driving portion configured to drive the optical scanning member;
• a reflection member of an elongated shape configured to reflect the light beam scanned by the optical scanning member;
• a housing in which the optical scanning member, the driving portion, and the reflection member are disposed;
• a first support portion provided in the housing and configured to support the reflection member at one point at an end in a longitudinal direction of the reflection member;
• a second support portion provided in the housing and configured to support the reflection member at a plurality of points at the other end in the longitudinal direction of the reflection member;
• a reinforcement portion configured to reinforce a structure of the second support portion side of the housing in the longitudinal direction of the reflection member, compared to a structure of the first support portion side of the housing;
• one first fixing portion provided in the housing and used to fix the housing to an image forming apparatus on the first support portion side in the longitudinal direction of the reflection member;
• and
• a plurality of second fixing portions provided in the housing and used to fix the housing to the image forming apparatus on the second support portion side in the longitudinal direction of the reflection member.