In the recent years conductive polymer composites (CPCs) as strain sensors has been widely investigated. A wide range of strain sensitivities and high repeatability are vital for different applications of strain sensors. Many of researches had done on the sensitivity of the strain and a bit researches were found on investigating the repeatability and stability with time of these sensors. In the present study hybrid conductive nanocomposites based on styrene-butadiene-styrene three-block copolymer (SBS), multi wall carbon nanotubes and reduced graphene oxide with different ratios of fillers was made by melt mixing method. Hybrid and non-hybrid nanocomposites were made by internal mixer and different sensitivity of strain sensor were obtained. Hybrid nanocomposites (SBS / MWCNT / RGO) with filler content of 4 wt% were selected as a high sensitivity sensor as well as good repeatability. Simultaneous the results showed that synergistic effect of two fillers, which causes a more stable conductive networks .To achieve such proper networks using individual filler in the polymer matrix was not possible.Morphology of the all samples were investigated by SEM.