Tape cartridge

A tape cartridge detachably installed on a cartridge installation portion of a tape printing apparatus having the cartridge installation portion and a press switch, the cartridge installation portion having an installation base portion and an installation peripheral wall portion surrounding the installation base portion and allowing the tape cartridge to be installed on the cartridge installation portion, the press switch having a stem projecting in a direction crossing an installation direction of the tape cartridge and provided on the installation peripheral wall portion, the tape cartridge comprising:

• a cartridge casing that constitutes an outer shell of the tape cartridge and has a first casing and a second casing, and
• a detected portion that is provided on an outer peripheral surface of the cartridge casing and corresponds to the stem when the tape cartridge is installed on the cartridge installation portion,
• wherein the detected portion includes a first recessed portion that is recessed on the outer peripheral surface of the cartridge casing on the first casing, and a second recessed portion that is recessed on the outer peripheral surface of the cartridge casing on the second casing so as to correspond to the first recessed portion, and
• the second recessed portion is shallower than the first recessed portion.