Deterioration diagnosis device for moving handrail of passenger conveyor

The invention provides a deterioration diagnosis device for the moving handrail of a passenger conveyor, which is easy in installation operation and can excellently prevent the leakage of radiation rays. The device is characterized by comprising a radiation generating part (2), a light receiving part (1) and a shielding plate (2e). A light source arranged in the radiation generating part is used for irradiating radiation on a moving handrail (10). The radiation generating part is also equipped with a frame for covering the radiation part of the moving handrail (10) and the light source. A camera (1C) arranged inside the light receiving part (1) for photographing the moving handrail (10). The light receiving part (1) is formed by the part photographed by the camera (1c) of the moving handrail (10) and the frame of the camera (1c). Meanwhile, a box body is formed by the light receiving part (1) and the frame of the light receiving part (1). The shielding plate (2e) is used for suppressing the leakage of the rad