Light scanning device

A light scanning device, comprising:

• a light source configured to emit a laser beam;
• a deflector configured to deflect the laser beam emitted from the light source;
• a motor configured to drive the deflector so as to scan the laser beam deflected by the deflector;
• an optical system configured to converge the laser beam deflected by the deflector on an object surface;
• a housing configured such that the motor and the optical system are fixed thereto, the housing including one of a through hole penetrating from an inside thereof to an outside thereof and a thin portion whose wall thickness is thinner than any other portion of the housing;
• and
• a heat radiating member including an exposed portion that is exposed outside the housing, the heat radiating member being configured such that heat generated inside the housing is radiated outside the housing from the motor via one of the through hole and the thin portion, and the exposed portion included in the heat radiating member.