Abstract: Disclosed herein is a rear projection display apparatus, including: a housing; a screen provided on the front face of the housing; a mirror provided at a predetermined position in the inside of the housing and configured to reflect image light toward the screen; an optical unit including a projection lens configured to project the image light toward the mirror and an image apparatus configured to output the image light to the projection lens; a light source configured to supply a flux of light to the optical unit; and an optical device mounting plate having an upper face on which the optical unit is mounted and provided in a cantilever fashion on a wall provided on the inner side of a lower portion of the front face of the housing.