A tape cartridge which is mounted in a tape printing apparatus provided with a detection part, includes a tape-shaped member which has a detection protrusion of which a lateral side partially protrudes in a tape width direction and a cartridge case in which a tape roll formed by winding the tape-shaped member into a roll shape is contained. In the tape cartridge, an exposed area is provided outside the cartridge case, the exposed area being where the detection protrusion provided in the tape-shaped member delivered from the tape roll and fed in a length direction of the tape-shaped member is exposed, the cartridge case has a cover which covers the tape-shaped member delivered from the tape roll in a tape feeding upstream side from the exposed area, and the cover includes a first cover, a second cover and a position regulating part.