PROJECTION DISPLAY DEVICE

To provide a projection display device which is compact and light-weight and offers high image quality.SOLUTION: A projection display device 100 is provided, comprising: an accommodating unit 31 capable of accommodating a light source unit (1, 2), an optical modulation element (11, 15, 17), and an optical system (3, 4, 5, 6) for irradiating the optical modulation element with light from the light source unit; a housing (21) for housing the accommodating unit (31); and reinforcement members (25, 26, 32), each extending from an outer surface of the accommodating unit to an inner surface of the housing to be in contact with the outer surface of the accommodating unit and the inner surface of the housing, where a side of each reinforcement member to be in contact with the inner surface of the housing is configured to be fixed to a side face of the housing.SELECTED DRAWING: Figure 5 【課題】小型かつ軽量で高画質な投射型表示装置を提供する。【解決手段】投射型表示装置（１００）は、光源ユニット（１、２）と光変調素子（１１、１５、１７）と光変調素子に光源ユニットからの光を照明する光学系（３、４、５、６）とを収容することが可能な収容部（３１）と、収容部（３１）を収容する筐体部（２１）と、収容部の外面から筐体部の内面へ延伸して設けられ、収容部の外面と筐体部の内面とに接する補強部材（２５、２６、３２）とを有し、補強部材の筺体部の内面に接する側は、筐体部の側面に固定されるように設けられている。【選択図】図５