To provide a method for producing a cyclohexene oxide through efficiently isolating it in high yield and selectivity from a reaction product obtained by reaction of a mixture of cyclohexane and/or benzene and cyclohexene in the presence of a solid catalyst easy to separate and refine.

This method for producing a cyclohexene oxide through isolating it comprises oxidizing a mixture of cyclohexane and/or benzene and cyclohexene with a peroxide in the presence of a transition metal element-containing silica mesopore molecular sieve catalyst.