Photocatalytic degradation and mineralization of pesticides are studied over TiO₂ supported mesoporous SBA-15 composite system using solar light. TiO₂ is immobilized over SBA-15 by solid sate dispersion method. The catalysts are characterized by XRD, surface area, UV–Vis diffused reflectance spectra, SEM and TEM. The detailed photocatalytic degradation studies are carried out over TiO₂, SBA-15 and different TiO₂ wt% supported SBA-15. The activity evaluation parameters such as catalyst amount, pH, and pollutant initial concentration are studied taking isoproturon as a model compound and established conditions for pesticide degradation. The optimum degradation is achieved over 10wt% TiO₂/SBA-15 within 30min and the reaction is following pseudo-first order kinetics. The isoproturon mineralization is monitored with TOC reduction and it takes around 9h for disappearance. The commercial pesticide solutions containing imidacloprid and phosphamidon are also successfully degraded over these composites with the established conditions. The data indicates that 10wt% TiO₂/SBA-15 composite is an effective and highly active system for the pesticide degradations.