To provide a sterilizing device capable of effectively sterilizing a handrail of an escalator or a moving sidewalk, etc., more particularly, retaining the sterilizing effect during working time of the escalator, etc.

This sterilizing device is each of sterilizing devices 200A and 200B provided in the vicinities of portions through which the rotating handrails 106A and 106B of the escalator 100 pass. Each of the sterilizing devices 200A and 200B includes an ultraviolet ray sterilizing lamp emitting ultraviolet ray for sterilization by power supply from a prescribed power source, and a body 204A of equipment, etc. as a holding means for holding the ultraviolet ray sterilizing lamp. The ultraviolet ray sterilizing lamp is constituted of first, second and third ultraviolet ray sterilizing lamps. The body 204A of equipment holds the first ultraviolet ray sterilizing lamp along a direction orthogonal to a rotating direction of the hand rail 106A in the vicinity of an outer peripheral surface side constituting a main surface 1061A of the handrail 106A, etc., and holds the second and third ultraviolet ray sterilizing lamps along a direction parallel to the rotating direction in the vicinity of each side of both side surfaces of the main surface of the handrail 106A.