Tape cassette

A tape cassette comprising:

• a housing having a top surface, a bottom surface, a front surface and a pair of side surfaces and that including a top case and a bottom case, the top case including a top wall having the top surface, and the bottom case including a bottom wall having the bottom surface;
• a wound tape mounted in the housing;
• an arm portion including a part of the front surface and an exit, and directing the tape along a predetermined feed path to the exit, at least a portion of the feed path extending in parallel with the front surface;
• a first lower indentation formed in the bottom case by upwardly indenting a part of the bottom surface and connected to an end on an upstream side of the arm portion in a feed direction of the tape, the first lower indentation having a first lower flat surface that is in a higher position than the bottom surface of the housing;
• and
• a first lower regulating portion provided in a section of the bottom case that forms a part of the arm portion and on an upstream side of the exit in the feed direction, the first lower regulating portion being spaced from the first lower flat surface in the vertical direction by a distance determined in accordance with a width of the tape, the first lower regulating portion being adapted to restrict a downward movement of the tape.