In this study, it was aimed to develop heterogeneous acidic mesoporous catalysts for epoxidation of soybean oil. For this, Ti-SBA-15 catalysts were prepared by hydrothermal synthesis with two Si/Ti molar ratios (10, 20). MoO3/Ti-SBA-15 catalyst were prepared by impregnating on the prepared Ti-SBA-15 catalysts. Two different loadings (8 and 12 %) were performed. The soybean oil epoxidation tests were performed in Radley multistation glass reactor system by hydrogen peroxide in ethyl acetate at 75 °C with stirring rate of 900 rpm. For comparison purposes, homogeneous catalysts tests were also performed with H2SO4. The catalyst were found to have mesoporous structure. Titania was succesfully incorporated in to SBA-15. Increasing titania content did not change acidity significantly. Loading of MoO3 decreased the surface area of Ti-SBA-15. Molybdenum loading increased the acidity of the catalysts. The acidity of MoO3/Ti-SBA-15 with 8 % wt MoO3 loading and 10 Si/Ti mole ratio was the highest. The catalysts showed different activities in epoxidation of soybean oil. Some catalysts deactivated. Others showed that the soy bean oil conversion and selectivity to epoxides increased with the acidity of the catalysts. The most active and selective catalyst was found to be 8% MoO3/Ti-SBA-15(10) which gave 35.6 % soybean oil conversion and 35.6 % selectivity to epoxides.