PROBLEM TO BE SOLVED: To provide a caster base body for a caster and a caster capable of being easily manufactured at low cost and to provide a manufacturing method for a caster base body capable of easily manufacturing the caster base body at low cost.;SOLUTION: The caster base body 1a comprises a hub part 11a; a rim part 12a; and a disc part 13a between the hub part and the rim part. The caster Ca has a tire part 14a attached to the rim part 11a of the base body 1a. A spoke part 132a is provided between adjacent openings by forming a plurality of openings 131a on the disc part 13a of the base body 1a. The hub part 11a, the rim part 12a and the disc part 13a have constant thickness t in a base body rotation central line direction such that the whole of the base body indicates constant thickness t and are integrally molded. The base body 1a is formed by intrusion-molding a continuous rod-like body 2 in the form that the base body is extended longer in a thickness direction and is obtained by cutting the continuous rod-like body 2 to the constant thickness t of the base body 1a. A shock-absorbing member 15a may be attached to the opening 131a of the disc part 13a.;COPYRIGHT: (C)2006,JPO&NCIPI
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