To provide a method for producing propylene oxide from propylene, hydrogen and oxygen in high selectivity of propylene oxide based on hydrogen.

There is provided a method for producing propylene oxide comprising a step of reacting hydrogen, oxygen and propylene in the presence of a noble metal catalyst, a titanosilicate having fine pores comprising ≥12-membered oxygen ring and an organic sulfur compound in a mixed solvent containing water and a nitrile compound.