Disclosed is a projection type image display apparatus including a projection section to output a projection light in which an image is attached through a projector lens and a photographing section to photograph a projected image projected by the projection section through a photographing lens, and the projected image which is projected on a screen by the projection section is obtained by the photographing section and a focus of the projected image is adjusted based on a photographing result of the image obtained by the photographing section, and the projector lens and the photographing lens are movable in a direction to change the focus of the projected image or a focus of the photographed image by a same drive section.