An image projecting device includes structure for correcting the distortion of an image and/or the defocusing of an image, which will be caused in a situation in which the optical axis of a projection lens is inclined with respect to a screen. The device includes a screen positioned along a predetermined plane, a source for emitting light which forms an optical image on the screen, with the optical axis of the source and the screen plane being inclined with respect to each other so that they are not optically normal with respect to each other, and a reflecting surface for reflecting light from the source towards the screen along a separate optical axis. The reflecting surface is optically positioned between the screen and the source and has a predetermined three-dimensional shape which is adapted to correct for trapezoidal distortion of the optical image projected onto the screen.