To provide an anti-glare device for a projector of which the structure is simple, which is superior in heat resistance, durability, and weather resistance, and in which adjustment of illuminance can be carried out simply.

This is attached to the projector in which a front face of a lighting fixture reflector 1 to house a lamp inside is covered by a transparent glass. A pair of semiannular member are mutually butted so that the outer periphery of the opening part of the reflector 1 is surrounded, and by means that the butting part is tightened by catch clips 12, a mounting frame 10 is fixed to the reflector 1. Furthermore, a holding frame 11 of the semitransparent plate is fitted to the end edge of the mounting frame 10, and fixed by the catch clips 13. At that time, between the end edge of the holding frame 11 and the end edge of the mounting frame 10, a semi-transparent plate 15 made of polycarbonate is pinched and made to be held. As the semi-transparent plate 15, a plurality of sheets having different optical transmissivities are prepared, and made to be exchanged by releasing the catch clips 13.