Microchip and Microchip Inspection System

An objective is to provide a microchip exhibiting no scattering of stored reagent together with reduced size, which is capable of rapidly mixing the reagent when used. Also disclosed is a microchip possessing a reaction section in which reaction with a reagent or a specimen supplied from a flow path is conducted via heat, wherein the reaction section possesses a storage section to store the reagent in advance, and the reagent previously stored in the storage section is sealed with a material which generates phase transition from a solid phase to a liquid phase between a storage temperature and a reaction temperature.