Projection display device

The present invention provides a projection-type display apparatus, comprising: a light source (101), for illuminating optical system (102) form an illumination light for illuminating the reflected light to form a reflection type light valve (106) is an optical image, with the projection optical system of the projection optical image (107) and a positive power lens (105). The optical axis of the reflection type light valve (115), the optical axis of the projection optical system (113) and the optical axis (114) coincide with each other in a positive power lens. An illumination optical system (102) is configured such that the illumination through a positive power lens (105) of light (106) reflected by the reflective light valves. An illumination optical system (102) of the exit pupil (108) and a projection optical system (107) of the entrance pupil (109) with respect to a positive power lens (105) having a conjugate relationship.