SIGNAL LAMP

A signal lamp 1 for emitting signal light is provided with: a light emitter unit 70 having a light emitter, i.e., a light source of the signal light; a main body 10 for housing the light emitter unit;and a heat generating unit 140, which is disposed, in the main body 10, on an optical path of the signal light emitted from the light emitter unit 70, and which has a board-shaped heat generating glass having a light transmitting conductive thin film on the surface, said heat generating glass generating heat when the conductive thin film is supplied with power via a pair of electrodes. 种用于发出信号用灯光的信号灯装置，其包括：发光体单元(70)，其具有作为信号用灯光的光源的发光体；主体(10)，其用于容纳所述发光体单元；以及发热单元(140)，其在主体(10)内配置在所述发光体单元(70)所发出的所述信号用灯光的光路上，并具有呈板状的发热玻璃，该发热玻璃在其表面形成有具有透光性的导电性薄膜，并通过经由对电极向该导电性薄膜供电而发热。