A tape printing apparatus includes a cartridge mounting portion in which a tape cartridge is mounted, the tape cartridge including a first case that has a first hook, a length of which is different for a plurality of types of tape cartridge, and a second case that has a first hook receiving portion with which the first hook engages is mounted, and a first hook detection sensor in which the output changes depending on the length of the first hook in a state in which a tape cartridge is mounted in the cartridge mounting portion.