A process for producing an oxirane compound.

A process for producing an oxirane compound from an organic hydroperoxide in ethylbenzene hydroperoxide and an olefin in the presence of an immobilized catalyst bed, wherein the process satisfies the following conditions (1) to (4) (1) catalyst bed is divided into n catalyst beds and the catalyst beds are used in series, an integer of 2 or more where n, (2) is divided fresh organic hydroperoxide in portions which are supplied to respective inputs of the beds catalyst, (3) fresh olefin is supplied to the inlet of the first catalyst bed, and (4) the reaction mixture discharged from each outlet of respective catalyst beds excluding the final catalyst bed is supplied to the inlet of the subsequent catalyst bed.