A method for manufacturing a needle-like body having a needle-like portion on a first surface of a substrate portion made of a thermoplastic resin is obtained by filling a replication plate having a concave portion corresponding to the shape of the needle-like portion with the thermoplastic resin. The step of forming the needle-like body and a support member made of a material different from the material constituting the needle-like body are disposed on the second surface of the substrate portion opposite to the first surface. And a step of peeling the acicular body and the support member together from the duplicate plate.熱可塑性樹脂で構成された基板部の第１面に針状部を備える針状体の製造方法は、前記針状部の形状に対応した凹部を備える複製版に前記熱可塑性樹脂を充填して前記針状体を形成する工程と、前記針状体を構成する材料とは異なる材料で構成されているサポート部材を、前記基板部の前記第１面とは逆側の第２面に配置する工程と、前記針状体と前記サポート部材を一体として前記複製版から剥離する工程と、を備える。
