The present invention provides a novel intermediate for manufacturing a 2,3-dihydroimidazo[2,1-b]oxazole compound with a high yield and a high purity, and a manufacturing method of the intermediate. The present invention provides an epoxy compound represented by the general formula (2): wherein, R1 represents a hydrogen or a lower alkyl group; and R2 represents a piperidyl group represented by the general formula (A1): (wherein, R3 represents a phenoxy group having a halogen-substituted lower alkoxy group substituted on a phenyl group, and the like) and the like; and n represents an integer of 1 to 6, a manufacturing method of the epoxy compound, and a manufacturing method of an oxazole compound using the epoxy method.