The novel Pt-and Rh-containing polymers based on polystyrene-polybutadiene block copolymers were studied in hydrosilylation of three systems of reagents : styrene/triethylsilane, 1-hexene/dimethylchlorosilane, and cyclohexanone/triethylsilane. All polymers containing Pt and Rh complexes were found to display some catalytic effect whose effectiveness for the same system of reagents is dependent on the nature of the polymeric ligand. On the other hand, the reagent nature influences even more strongly the catalytic properties of polymers. No side products of hydrosilylation was observed with Rh-containing polymer catalysts in cyclohexanone/triethylsilane system.