Abstract: A portable liquid crystal display (LCD) projector with a bag type housing containing therein an optical part and a mechanical part which is capable of being used in both front projection type and rear projection type and enhancing the carrying performance while having a proper screen size. The projector includes a fixed mirror and a movable mirror disposed between a projection screen and a screen, and a fixed LCD mirror disposed between the LCD and the projection lens. The screen is detachably mounted to a screen holder which is movably mounted to a housing and provided with a rectangular transmitting hole and mounted to the screen holder is a mirror holder attached with the movable mirror.