To provide a chip constituted so as to exert no effect on the surface smoothness of a substrate, capable of being easily formed of a material easy to obtain and capable of preventing the adhesion of a specimen other than the fixing region of a carrier, and its manufacturing method.

The chip T is constituted so as to support the carrier, which has the component reacting with a component serving as a detection target, on the surface of the substrate 1. The region of a coating film 2 of a phosphorylcholine like group-containing polymer and a fixing region 3 which keeps the surface of the substrate 1 exposed are formed to the surface of the substrate 1.