Cartridge

A cartridge to be installed in a tape printing device including a cartridge installation part, a printing head that is provided in the cartridge installation part and performs printing on a printing tape, and a device case, the device case having a device-side tape introduction port that introduces the printing tape from an outside to an inside of the device case and a device-side tape ejection port that ejects the printing tape to the outside of the device case, the cartridge comprising:

• a cartridge case, the cartridge case having a cartridge-side tape introduction port that introduces the printing tape introduced from the device-side tape introduction port into the cartridge case and a cartridge-side tape ejection port that ejects the printing tape to the outside of the cartridge case toward the device-side tape ejection port in a state in which the cartridge is installed in the cartridge installation part,
• the cartridge case including a front-side case and a back-side case, the front-side case having a ribbon-part front-side case and a tape-retention-part front-side case,
• the cartridge including a tape retention part that retains the printing tape that is introduced in advance into a tape path between the cartridge-side tape introduction port and the cartridge-side tape ejection port before the cartridge is installed in the cartridge installation part,
• the tape path being provided between the ribbon-part front-side case and the tape-retention-part front-side case.