The　dependence　of　four-wave　mixing　(FWM)　generated　in　Rubidium　(Rb)　vapor　with　electromagnetically　induced　transparency　(EIT)　window　on　polarizations　of　the　incident　fields　is　studied　both　theoretically　and　experimentally.　The　polarization　properties　of　FWM　signal　under　diverse　laser　polarization　configurations　are　studied　and　compared.　The　results　indicate　that　FWM　signal　is　linear　polarized　when　all　incident　fields　are　linear　polarized.　However,　FWM　becomes　elliptical　polarized　if　any　incident　field　is　elliptical　polarized.　Moreover,　the　polarizations　of　the　incident　fields　also　influence　the　dressing　effect　of　the　coupling　field　on　FWM　process.　As　the　polarization　of　coupling　field　(or　probe　field)　varying　from　linear　to　circular,　the　dressing　effect　gets　stronger.　By　controlling　the　polarizations　of　the　incident　beams　polarizations,　we　can　manipulate　the　polarization　state　of　FWM　signal　and　the　dressing　effect　as　well.　(C)　2012　Elsevier　B.V.　All　rights　reserved.