A laminating tape has an adhesive layer for adhering to a recording surface of a to-be-laminated tape, and is formed to have a substantially identical width to a width of the to-be-laminated tape. The laminating tape has a preliminary laminating portion formed at a leading end thereof, for being preliminarily laminated to the to-be-laminated tape, and a non-adhesive portion having a predetermined length and extending continuously from an trailing end of the preliminary laminating portion, for permitting lateral motion of the laminating tape with respect to the to-be-laminated tape. In another aspect of the invention, a to-be-laminated tape is provided which has a preliminary to-be-laminated portion formed at a leading end thereof for being preliminarily laminated to a leading end of the laminating tape, and an adhesion-refusing portion having a predetermined length and extending continuously from a trailing end of the preliminary to-be-laminated portion, for permitting lateral motion of the to-be-laminated tape with respect to the laminating tape. A method and device for initially laminating the laminating tape to the to-be-laminated tape are also provided.