An image display apparatus (1000) mounted on an object or attached to a human body, includes: an image forming unit (200) to form an image with light; an optical system including a curved mirror (9) that reflects the light forming the image toward a bent transmission and reflection member; and a rotator (310) to rotate the curved mirror (9) about a prescribed axis. A first projection image, which is a projection image on an XY plane of the image, forms an angle θ1 with respect to an X direction. A second projection image, which is a projection image on an XY plane of the prescribed axis, forms an angle θ2 with respect to the X direction. The X denotes a lateral direction of the object or the human body and the Y direction denotes a vertical direction of the object or the human body.