To obtain an image projector capable of obtaining a projection image, in which variation in optical performance of a projection lens is small and which has a good image quality, by reducing absorption of luminous flux of the projection lens and luminous flux shielded by a wall surface of a lens barrel.

The image projector includes: an image display element; an illumination optical system illuminating the image display element with the luminous flux emitted from a light source means; a projection optical system having a zoom function and projecting the luminous flux from the image display element to a projection surface; the lens barrel holding the projection optical system; and a temperature control means controlling temperature of at least one of the projection optical system and the lens barrel based on a zoom position of the projection optical system.