The present invention relates to a surgical lamp including: a light-emitting unit emitting light in one direction a diffusion lens unit coupled to a light-emitting surface of the light-emitting unit and diffusing the light generated by the light-emitting unit a heat radiation unit coupled to the back face of the light-emitting surface of the light-emitting unit and transmitting heat generated by the light-emitting unit and a cover unit having one open surface, having an inner space, having the shape of a cylinder where the circumference of one open surface exceeds that of the other surface, coupled to the heat radiation unit inside the other surface, and provided with a reflective part on its inner peripheral surface, the reflective part reflecting the light diffused by the diffusion lens unit in a light emission direction. One surface of the diffusion lens unit is coupled to the light-emitting unit and the other, silicon-based, surface of the diffusion lens unit has the shape of a concave cylinder. The diffusion lens unit diffuses the light generated by the light-emitting unit. According to the present invention, the diffusion lens unit uniformly diffuses light emitted by a plurality of LEDs, and thus no shade attributable to a radiation intensity difference arises. As a result of the diffusion, shade- or dazzling-based misdiagnosis and medical accidents can be prevented during diagnosis and treatment. The diffusion lens unit is made of highly heat-resistant silicon, and thus a deformation attributable to heat from the LEDs can be prevented and the durability of the surgical lamp can be improved. As a result of the light diffusion by the diffusion lens unit, the number of the LEDs required for uniform light emission can be reduced. Accordingly, LED-based heat generation can be reduced. The structure of the reflective part for reflecting the diffused light according to the present invention is simpler than in the related art, and thus the present invention can be de
