Mental　rotation　of　hands,　which　is　subject　to　biomechanical　constrains,　involves　participants　engaging　in　motor　imagery　processing.　To　contribute　to　a　better　understanding　of　the　process　of　hand　mental　rotation,　reaction　times　and　event-related　potential　were　measured　while　participants　were　performing　a　left-　right　hand　recognition　task.　Participants　apparently　solved　the　task　by　imagining　their　own　hands　rotating　to　the　orientation　of　the　stimulus　for　comparison.　In　line　with　previous　studies,　the　behavioral　results　showed　that　slower　reaction　times　were　found　for　the　hand　views　that　could　not　be　easily　reached　with　real　movement.　More　importantly,　the　event-related　potential　results　revealed　that　the　amplitude　of　rotation-related　negativity　(RRN)　decreased　with　the　difficulty　of　the　hand　views　increasing.　The　previous　results　are　complemented　by　this　study;　it　is　stimulus　views　that　modulate　reaction　times　and　the　amplitude　of　RRN　during　mental　rotation　task　of　hands.　©　Springer-Verlag　Berlin　Heidelberg　2014.