Presented paper shows results of the tensile strength of the rGO-PDMS composite (pure PDMS doped with reduced graphene oxide (rGO). As a result, the relative elongation of the rGO-PDMS was obtained reaching 600% as compared to control samples before breaking of the composite. Microfractographic measurements of fracture in static tensile test showed delamination in places where rGO flakes were present, what favored the initiation of breaking process. The decrease of the Young module was observed by 8% when PDMS was doped with reduced graphene oxide.