A tape cartridge which is mounted in a tape printing apparatus provided with a detection part, comprising: a tape-shaped member which has a detection protrusion of which a lateral side partially protrudes in a tape width direction; a cartridge case in which a tape roll formed by winding the tape-shaped member into a roll shape is contained; and a retracting prevention part which is formed on a bottom wall portion of the cartridge case and protrudes toward a top wall portion of the tape cartridge, wherein 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 which covers either one of a front side or a back side of the detection protrusion; a second cover which covers the other of the front side or the back side of the detection protrusion; and a position regulating part, which is positioned at a protruding tip end side of the retracting prevention part and which is provided to connect the first cover and the second cover, and contacts a protruding end of the detection protrusion to regulate a position of the tape-shaped member in a protruding side of the detection protrusion, when a force toward a protruding side of the detection protrusion causing the tape-shaped member to be fed in a slanted state is applied to the tape-shaped member; a left side face of the cartridge case has a tape feeding port through which the tape-shaped member fed from the tape roll passes, the tape feeding port is formed such that a gap between the protruding end of the detection protrusion and an upper end of the tape feeding port is formed, when the detection protrusion passes through the tape feeding port, the cartridge case is provided with a protruding opening through which the detection protrusion protrudes, the cover is provided in a tape feeding upstream end of the protruding opening, and the tape feeding port is disposed at a tape feeding downstream end of the protruding opening. a tape-shaped member which has a detection protrusion of which a lateral side partially protrudes in a tape width direction; a cartridge case in which a tape roll formed by winding the tape-shaped member into a roll shape is contained; and a retracting prevention part which is formed on a bottom wall portion of the cartridge case and protrudes toward a top wall portion of the tape cartridge, wherein 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 which covers either one of a front side or a back side of the detection protrusion; a second cover which covers the other of the front side or the back side of the detection protrusion; and a position regulating part, which is positioned at a protruding tip end side of the retracting prevention part and which is provided to connect the first cover and the second cover, and contacts a protruding end of the detection protrusion to regulate a position of the tape-shaped member in a protruding side of the detection protrusion, when a force toward a protruding side of the detection protrusion causing the tape-shaped member to be fed in a slanted state is applied to the tape-shaped member; a first cover which covers either one of a front side or a back side of the detection protrusion; a second cover which covers the other of the front side or the back side of the detection protrusion; and a position regulating part, which is positioned at a protruding tip end side of the retracting prevention part and which is provided to connect the first cover and the second cover, and contacts a protruding end of the detection protrusion to regulate a position of the tape-shaped member in a protruding side of the detection protrusion, when a force toward a protruding side of the detection protrusion causing the tape-shaped member to be fed in a slanted state is applied to the tape-shaped member; a left side face of the cartridge case has a tape feeding port through which the tape-shaped member fed from the tape roll passes, the tape feeding port is formed such that a gap between the protruding end of the detection protrusion and an upper end of the tape feeding port is formed, when the detection protrusion passes through the tape feeding port, the cartridge case is provided with a protruding opening through which the detection protrusion protrudes, the cover is provided in a tape feeding upstream end of the protruding opening, and the tape feeding port is disposed at a tape feeding downstream end of the protruding opening.