A tape cassette includes an ink ribbon provided with a base film coated with an ink layer thereon and a film tape provided with a transparent film with an adhesive layer formed on one surface thereof. When an adhesive layer of the film tape and the ink layer of the ink ribbon of the tape cassette come into contact at a print position, the ink layer is adhered onto the adhesive layer on condition that the adhesive layer is heated to exhibit self-adhesive properties, and characters and the like are printed on the film tape. Also, an auxiliary sheet medium comes into contact with the adhesive layer. Further, a conveying roller does not come into contact with the adhesive layer.