A projection display device includes: a light source; a rod-type integrator which unifies light emitted from the light source in intensity distribution; an imager which modulates the light emitted from the integrator; and an optical axis adjuster for adjusting an optical axis of the light source with respect to an incidence plane of the integrator. In this arrangement, the integrator has the incidence plane formed in the shape of a rectangle and inclines around an optical axis of the integrator with respect to an installation surface of a main body cabinet in which the light source is disposed. In addition, the optical axis adjuster shifts the light source relatively with respect to the incidence plane in a direction parallel to a shorter side of the incidence plane.