To stably and efficiently clean a small lot color cathode-ray tube with high adaptability by spraying wash water on rotated panels by a panel inside surface cleaning nozzle at cleaning time, and cleaning them by friction by sponges.

A crescent fixed cleaning sponge 3 which contacts with the whole inside surface of large and small panels 1 and 2 to rotate in the arrow B direction and is smaller than the short edge of the small panel 2 when inserted into the inside surface side of the large and small panels 1 and 2 and contacts with the whole surfaces of the large panel 1 and a rotary cleaning sponge 4 which has plural edge guides 20 and is a round shape and can move in the arrow A direction, are provided on a cleaning head as cleaning sponges. When these sponges are inserted into a panel inside surface, the rotary cleaning sponge 4 is inserted and fixed inside the fixed cleaning sponge 3, and at cleaning time, the fixed cleaning sponge 3 cleans an inside surface center part of the large and small panels 1 and 2 by its diametrical part, and the rotary cleaning sponge 4 cleans the outside of the fixed cleaning sponge 3 by rotating along the panel edges of the large and small panels 1 and 2.