An image projection apparatus includes a light source unit including a light source detachable from a main body, an image forming part to form an image with a light from the light source, a projection optical system to project the image, an openable cover to open and close an opening formed for attaching and detaching the light source unit to and from the main body, an abutting member on which the light source unit abuts when the light source unit is attached to the main body, and a pressing member to press the light source unit to the abutting member, in conjunction with a fix operation of the openable cover to the main body.