Poly(3-valerylpyrrole)(PVPy)/multi-wall　carbon　nanotubes　(MWNTs)　composites　have　been　prepared　by　in　situ　chemical　polymerization　of　3-valerylpyrrole　(VPy)　on　MWNTs.　The　structure　and　properties　of　the　samples　were　studied　by　FT-IR,　XRD,　SEM,　TEM,　TGA　and　four　probe　method.　FT-IR　suggested　an　existence　of　interaction　between　PVPy　and　MWNTs.　TEM　indicated　that　PVPy　was　only　coated　on　the　external　surface　of　MWNTs.　XRD　patterns　implied　that　the　intensity　of　the　peaks　at　around　25.82°　and　42.92°　decreased　with　the　increase　of　the　mass　ratio　of　VPy　to　MWNTs.　In　addition,　the　electrical　conductivity　of　the　samples　was　investigated　at　room　temperature,　and　the　results　exhibited　that　MWNTs　enhanced　the　conductivity　of　PVPy/MWNTs　composites　compared　to　PVPy.　The　conductivity　of　PVPy/MWNTs　composites　was　2.37　S/cm　(VPy:MWNTs=2.5:1)　and　0.25　S/cm　(VPy:MWNTs=5:1),　respectively.