An attachment structure of a tape body for supporting a tape body, such as a leader tape, to which a magnetic tape is connected, is supported by a Lille hub, which is a cylindrical hub mounted on the center and a clamp member attached to the Lille hub It comprises a tape Lille equipped with a tape clamp member and a tape body which is connected to the Lille hub and is wound around the outer periphery of the Lille hub. In the tape body supported by the Lille hub, the base end side which is the base portion of the extraction side from the Lille hub is deformed in the winding direction to the Lille hub in accordance with the outer peripheral surface of the Lille hub. The tape body is deformed by thermal deformation, pressure deformation, or thermal deformation and pressure deformation. The tape body of the tape body is deformed in accordance with the outer peripheral surface of the Lille hub so as to be deformed along the outer periphery of the hub of the Lille hub.
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