An image forming apparatus includes a photoreceptor; an exposure portion configured to include a substrate having a plurality of light emitting portions arranged along a rotation axis direction of the photoreceptor and exposes the photoreceptor to form a latent image on the photoreceptor; a development portion configured to develop a latent image formed on the photoreceptor with toner; an exposure duct configured to guide the airflow generated by a first fan along a longitudinal direction of the substrate; a development duct configured to guide the airflow generated by a second fan along the rotation axis direction of the development portion; and a first duct communicating with the exposure duct and the development duct, the first duct configured to exhaust air introduced from the exposure duct and exhaust air introduced from the development duct.