In order to provide a discharge lamp with reflector in which thermal deterioration is inhibited by the diffusing of the irradiated light that leaks from the glass end part of the sealed part to suppress the rise in temperature of the component parts of the projector arranged to the rear of the lamp, the following means are used: In the discharge lamp with reflector 1 pertaining to the this invention, which constitutes a discharge lamp with reflector 1 in which a light-emitting tube 2 is housed in the reflector 3 interior and a rear sealed end part 4 of the light-emitting tube 2 is exposed to the rear of the reflector 3, the rear sealed end part 4 of the light-emitting tube 2 is formed as a frosted part 6.