A tape unit has a support including a rotation support section rotatably supporting a tape spool and facing a roll part of a print tape, and a junction section extending from the rotation support section. A guide groove for guiding the print tape pulled out from the roll part is formed on the junction section. By virtue of such composition, the tape unit can be attached to a cassette case body of a tape cassette maintaining the print tape in the guide groove, by which the replacement of the tape unit which is stored in the cassette case body can be made easier.
