The application of MCM-41 functionalized by 12-tungstophosphoric acid (TPA) as drug carrier for cancer treatment was studied by loading of camptothecin (CPT). In-vitro controlled release study of CPT in Simulated Body Fluid (pH 7.4, 37 °C) was carried out under stirring as well as static conditions. The systems were also evaluated on cancer cells (HepG2) and the carriers are found to be non-toxic to the cancer cells. In order to see the influence of inorganic moiety on release rate of drug, study was also carried out with CPT loaded unfunctionalized MCM-41. A detailed study on release kinetics and release mechanism using First Order Release Kinetic Model, Higuchi Model, Koresmeyer-Pepps Model and Extended kinetic model was also carried out.