A thermal transfer printer for film capable of thermal transfer printing on a plastic film. The thermal transfer printer for film is provided with a conveyance for conveying the plastic film along a predetermined path, an ink ribbon moving mechanism which includes a holder for holding a plurality of ink ribbons 11 and moves an ink ribbon selected arbitrarily from the plurality of ink ribbons to a print position arranged on the predetermined path, and a print head which prints on the plastic film by heating the ink ribbon moved to the print position.