An image forming apparatus is disclosed, which includes an optical scanning portion which forms an electrostatic latent image on a photosensitive body; a placing member on which the optical scanning portion is placed; a first supporting member to which the placing member is fixed; a second supporting member opposite the first supporting member across the placing member; and a connecting member which connects the second supporting member and the placing member, the connecting member including a first surface which is fixed to the second supporting member and a second surface which is bent at an approximately right angle with respect to the first surface and is fixed to the placing member.