A repairing method for an endoscope includes inserting into a cylindrical heating element a repair part of at least one endoscope having a resin material applied on an outer peripheral surface of the endoscope, causing the heating element to generate heat by supplying power to the heating element in order to radiate infrared rays from the heating element toward the center of the cylinder, and drying/hardening the resin material in the repair part by using the infrared rays radiated from the heating element.