The disclosure discloses a medium cartridge including a recording medium roll with a long recording medium wound around an axis, a support member, and at least one of first protruding parts and second protruding parts. The support member rotatably supports the recording medium roll. The first protruding parts are disposed on the recording medium roll so as to respectively protrude to one side and another side in an axial direction and face the support member. The second protruding parts are disposed on the support member so as to respectively protrude to the one side and the another side in the axial direction and face the recording medium roll.