PURPOSE:To improve the cooling effect of a lamp seal section and obtain a halogen lamp with higher reliability by providing vent holes on the base section of a mirror. CONSTITUTION:This device is constituted of a lamp 5 and a mirror 6 fixed to the lamp 5, and multiple ventilating holes 7 preferably with the diameter 1.5 mm or above are provided on the base section outside the light collecting face of the mirror 6. The air heated by the hot lamp 5 can be efficiently removed to the outside of the lamp 5, the heating of the seal section of the lamp 5 is prevented, the high-temperature section of the lamp 5 can be cooled by the ventilation of the lamp 5, and the temperature of the seal section can be further lowered. The lamp 5 with high reliability is obtained.