A heating drum, which guides a long-sized medium and also heats and dries the medium, includes a cylinder-shaped main body part, disc-shaped limb parts attached to the end parts of the main body part, and a shaft core attached to the limb parts. On an edge of an inner circumferential surface of the main body part, a cut-out part extending in the circumferential direction is formed. A groove part also extending in the circumferential direction is formed on the inner circumferential surface on an inner side from the cut-out part of the main body part. The cut-out part and the groove part are in parallel with each other, and the limb part is fitted to the cut-out part. A claw part is 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.