In an optical device (44), an optical axis (A) of a projection lens (46) is shifted relative to a central axis (C) of an image formation area of a liquid crystal panel (441), and a central axis (B) of a light-incident side of the cross dichroic prism (444) is shifted relative to a central axis (C) of the image formation area of a liquid crystal panel (441) to be located between the optical axis (A) of the projection lens (46) and the central axis (C) of the image formation area of the liquid crystal panel (441).