Solid catalysts comprising manganese salen and hydrous zirconia were synthesized and characterized, and catalytic activity was evaluated by carrying out solvent-free liquid phase aerobic oxidation of styrene. As solid catalysts show high conversion of styrene with good selectivity toward benzaldehyde and styrene epoxide. The recovery of the catalyst was readily accomplished by simple filtration. The recycled catalyst can be used up to four cycles without any loss in conversion as well as selectivity.