A heating drum (D), which guides a long-sized medium (X1) and also heats and dries the medium (X1), comprising: a cylinder shaped main body part ; disc-shaped limb parts attached to the two end parts of the main body part ; and a shaft core attached to the limb part , characterized in that on the edges of the two end parts of the inner circumferential surface of the main body part , cut-out parts that extends in the circumferential direction are formed, respectively, and a groove part that extends in the circumferential direction is formed on the inner circumferential surface on the inner side from the cut-out part of the main body part , and the longitudinal direction of the cut-out part and the longitudinal direction of the groove part are in parallel with each other, and the limb part is fitted to the cut-out part , with a claw part being fixed to the limb part by a fitting tool , so that a hook part of the claw part is freely movably fitted to the groove part , and that on the edge parts of the two end parts of the inner circumferential surface of the main body part , cut-out parts with a narrow width, which extends in the circumferential direction, are formed, respectively, and the cut-out part and the narrow-width cut-out part are alternately disposed, with the width of the narrow-width cut-out part being set to be smaller than the width of the cut-out part , and a plurality of cut-out parts on the limb side are formed on the limb part with a predetermined interval so that an end part of the limb part with no limb-side cut-out part being formed thereon is fitted to the cut-out part , with an end part of the limb part with the limb-side cut-out part being formed thereon being fitted to the narrow-width cut-out part . a cylinder shaped main body part ; disc-shaped limb parts attached to the two end parts of the main body part ; and a shaft core attached to the limb part , characterized in that on the edges of the two end parts of the inner circumferential surface of the main body part , cut-out parts that extends in the circumferential direction are formed, respectively, and a groove part that extends in the circumferential direction is formed on the inner circumferential surface on the inner side from the cut-out part of the main body part , and the longitudinal direction of the cut-out part and the longitudinal direction of the groove part are in parallel with each other, and the limb part is fitted to the cut-out part , with a claw part being fixed to the limb part by a fitting tool , so that a hook part of the claw part is freely movably fitted to the groove part , and that on the edge parts of the two end parts of the inner circumferential surface of the main body part , cut-out parts with a narrow width, which extends in the circumferential direction, are formed, respectively, and the cut-out part and the narrow-width cut-out part are alternately disposed, with the width of the narrow-width cut-out part being set to be smaller than the width of the cut-out part , and a plurality of cut-out parts on the limb side are formed on the limb part with a predetermined interval so that an end part of the limb part with no limb-side cut-out part being formed thereon is fitted to the cut-out part , with an end part of the limb part with the limb-side cut-out part being formed thereon being fitted to the narrow-width cut-out part . <EOS>