A method for cleaning a tire for removing deposits (X) being unnecessary and adhering to a predetermined range by irradiating the predetermined range of a tire surface with plasma (P) from an irradiation head , characterized in that the method comprises using a tire having identical specifications as the tire to be cleaned or a rubber sample similar thereto, the output strength of the plasma (P) is set to a predetermined value within the range of a required output strength of the plasma (P) required to remove the unnecessary deposits (X), setting the separation interval (d) between an irradiation port of the irradiation head and a rubber surface of the tire in the predetermined range and the irradiation time (t) of the plasma (P) to be different, irradiating with the plasma (P) in a pinpoint manner without moving the irradiation head and the rubber surface in the predetermined range in relation to each other, observing the predetermined range irradiated with the plasma (P), and based on observation results of the removal state of the deposits (X) adhering to the predetermined range and the damage state of the rubber on the rubber surface in the predetermined range , identifying an allowable range for each of the predetermined value of the output strength, the separation interval (d) and the irradiation time (t) as the irradiation conditions of plasma (P) in which rubber on the tire surface in the predetermined range is not damaged by the irradiated plasma (P) in advance and irradiating plasma (P) from the irradiation head to the predetermined range of the tire to be cleaned under the allowable range of irradiation conditions identified in advance to remove the deposits (X). characterized in that the method comprises using a tire having identical specifications as the tire to be cleaned or a rubber sample similar thereto, the output strength of the plasma (P) is set to a predetermined value within the range of a required output strength of the plasma (P) required to remove the unnecessary deposits (X), setting the separation interval (d) between an irradiation port of the irradiation head and a rubber surface of the tire in the predetermined range and the irradiation time (t) of the plasma (P) to be different, irradiating with the plasma (P) in a pinpoint manner without moving the irradiation head and the rubber surface in the predetermined range in relation to each other, observing the predetermined range irradiated with the plasma (P), and based on observation results of the removal state of the deposits (X) adhering to the predetermined range and the damage state of the rubber on the rubber surface in the predetermined range , identifying an allowable range for each of the predetermined value of the output strength, the separation interval (d) and the irradiation time (t) as the irradiation conditions of plasma (P) in which rubber on the tire surface in the predetermined range is not damaged by the irradiated plasma (P) in advance and irradiating plasma (P) from the irradiation head to the predetermined range of the tire to be cleaned under the allowable range of irradiation conditions identified in advance to remove the deposits (X). <EOS>