Image forming apparatus having optical scanning unit with wire harness and connector

An image forming apparatus, comprising:

• a main housing that includes a main box portion in which a first opening is formed and a cover portion attached to the main box portion and covering the first opening;
• an optical scanning unit that includes an optical scanner, an electronic board on which circuitry for driving the optical scanner and a connector are mounted, and a unit housing that houses the optical scanner and the electronic board and has a second opening that externally exposes the connector, the optical scanning unit being housed within the main box portion;
• and
• a wire harness connected to the connector of the electronic board and wired within the main box portion;
• wherein
• the unit housing includes:
• a protruding inner frame portion configured to protrude from an outer surface of the unit housing and surround the second opening;
• and
• a wiring portion configured to form a lead-out path of the wire harness extending from inside to outside of the protruding inner frame portion;
• the cover portion includes a protruding outer frame portion configured to protrude from an inner surface of the cover portion and surround the protruding inner frame portion;
• a top portion of the protruding inner frame portion is formed along an inner-side portion of the protruding outer frame portion on an inner surface of the cover portion;
• and
• a top portion of the protruding outer frame portion is formed along an outer-side portion of the protruding inner frame portion on the outer surface of the unit housing.