Intra-active　touch　(IAT)　is　a　process　that　involves　a　body　part　doing　the　touching　(active　touch　[AT])　and　another　body　part　being　touched　(passive　touch　[PT])　simultaneously.　The　brain　representation　related　to　IAT　is　still　unclear.　A　total　of　23　subjects　carried　out　angle　discrimination　under　PT,　AT　and　IAT　conditions　with　functional　magnetic　resonance　imaging.　All　of　the　tasks　were　strictly　dependent　on　cutaneous　feedback　from　the　finger(s).　As　the　subjects　were　able　to　perceive　the　angle　stimuli　from　the　right　(touching)　and　left　(touched)　sides　during　the　IAT　condition,　we　expected　there　would　be　greater　brain　activation　with　the　IAT　condition　than　for　the　AT　or　PT　condition.　Therefore,　we　hypothesized　that　the　region　within　and/or　around　the　intraparietal　sulcus　(IPS)　and　the　part　of　the　primary　somatosensory　cortex　(SI)　that　is　associated　with　high-level　tactile　spatial　processing　would　be　more　active　during　the　IAT　task　than　during　the　AT　and　PT　tasks.　Compared　with　the　areas　activated　by　the　motor　somatosensory　control　task,　the　most　prominent　activation　areas　evoked　by　the　three-angle　discrimination　tasks　were　in　the　SI　and　secondary　somatosensory　cortex　areas　in　the　bilateral　parietal　operculum,　IPS,　lateral　occipital　complex,　insula　and　cerebellum.　Finally,　we　directly　compared　IAT　with　AT　and　PT,　and　the　results　suggest　that　the　contralateral　part　of　IPS　and　part　of　the　SI　are　more　active　under　IAT　conditions　than　under　either　AT　or　PT　conditions.　These　results　suggest　that　both　hemispheres　contribute　to　angle　discrimination　during　IAT.　Hum　Brain　Mapp　33:2957-2970,　2012.　(C)　2011　Wiley　Periodicals,　Inc.