An image projection apparatus for generating an image based on image data and for projecting the image, the apparatus comprising: an image generation element configured to modulate light emitted from a light source to generate an image; a holding unit that rotatably holds the image generation element in a plane; an illumination optical unit that includes one or more optical systems (23, 24, 25) and a light tunnel (22, 221, 222) that is a tubular member surrounding part of a light path from the light source to the image generation element, said light tunnel (22, 221, 222) being adapted to reflect the light by an inner surface thereof, and to project the light passing therethrough onto a predetermined illumination area including the entire area of a rotatable range of the image generation element; and a fixing unit which supports the holding unit and adapted to assist a movement of the holding unit; wherein the image generation element is a rectangle, wherein the light tunnel has an inner surface whose cross-sectional shape is a square, wherein the predetermined illumination area is a square in which a length of one side of the square is equal to or longer than a diagonal length of the rectangle, wherein the fixing unit includes a top plate, a base plate, and a magnet, wherein the holding unit includes a movable plate, a coupling plate, and a coil, wherein the fixing unit and the holding unit are superposed such that the coupling plate, the base plate, the movable plate, and the top plate are arranged in order from top to bottom, the coupling plate being fixed to the movable plate with the base plate therebetween, wherein the top plate includes a central hole and the magnet is arranged around the central hole, wherein the coil is provided on a top side of the movable plate at a position opposite of the magnet, and wherein the movable plate is adapted to be displaced in the plane with respect to the top plate in response to a Lorentz force produced between the magnet and the coil. an image generation element configured to modulate light emitted from a light source to generate an image; a holding unit that rotatably holds the image generation element in a plane; an illumination optical unit that includes one or more optical systems (23, 24, 25) and a light tunnel (22, 221, 222) that is a tubular member surrounding part of a light path from the light source to the image generation element, said light tunnel (22, 221, 222) being adapted to reflect the light by an inner surface thereof, and to project the light passing therethrough onto a predetermined illumination area including the entire area of a rotatable range of the image generation element; and a fixing unit which supports the holding unit and adapted to assist a movement of the holding unit; wherein the image generation element is a rectangle, wherein the light tunnel has an inner surface whose cross-sectional shape is a square, wherein the predetermined illumination area is a square in which a length of one side of the square is equal to or longer than a diagonal length of the rectangle, wherein the fixing unit includes a top plate, a base plate, and a magnet, wherein the holding unit includes a movable plate, a coupling plate, and a coil, wherein the fixing unit and the holding unit are superposed such that the coupling plate, the base plate, the movable plate, and the top plate are arranged in order from top to bottom, the coupling plate being fixed to the movable plate with the base plate therebetween, wherein the top plate includes a central hole and the magnet is arranged around the central hole, wherein the coil is provided on a top side of the movable plate at a position opposite of the magnet, and wherein the movable plate is adapted to be displaced in the plane with respect to the top plate in response to a Lorentz force produced between the magnet and the coil.