A tape cartridge which can be positioned near a print head is provided. A tape cartridge is loaded in a tape printing device including a print head, a head support frame causing the print head to swivel, and a protrusion provided on the head support frame, and has a print tape. The tape cartridge includes a platen roller which receives a pressing force of the print head; a cartridge case having a platen support section which supports the platen roller; and a receiving section which is provided on the side of the print head, of the platen support section, and receives the protrusion.