Patent ID: 7025296

Claim:
A tape cassette to be used for a tape printing device, in which a tape unit, including a print tape rolled up around a tape spool having opposite ends and being erected substantially in the vertical direction, is exchangeably stored in a cassette case body having a support surface for supporting said tape spool at one of said ends, wherein: said tape unit includes a support including: a rotation support section which is formed at one of said ends of said tape spool opposite to the end supported by said support surface and holds said tape spool rotatably; and a junction section which extends from said rotation support section, a guide groove for guiding said print tape pulled out from a tape roll part is formed on said junction section, wherein said guide groove guides said print tape at one side of said print tape in a width direction, and further regulates said print tape in both directions perpendicular to a plane of said print tape, a projecting part for reinforcement being formed on the under surface of a part of said junction section where said guide groove is provided, wherein said guide groove traverses said junction section and said tape cassette case body has a receiving opening which receives said projecting part when said tape unit is stored in said cassette case body.