The projection display unit includes an illumination section including one or a plurality of light sources, a light valve that modulates light emitted from the illumination section and outputs the modulated light, a projection lens section that projects the light outputted from the light valve onto a projection surface, a light-receiving section including an imaging device that receives light incident via the projection lens section, and an optical device that allows for splitting into respective optical paths that pass through the illumination section, the light valve, and the light-receiving section. A first range corresponding to a portion of a pupil range of the projection lens section is assigned for projection, and the light-receiving section includes a light-shielding part that performs light-shielding of a selective part corresponding to the first range, at a position substantially optically conjugate with respect to an aperture of the projection lens section.