A　new　type　transducer　used　to　excite　and　receive　torsional　modes　has　been　developed.　It　consists　of　several　shear　mode　piezoelectric　elements　which　are　in　identical　thickness　and　are　made　by　commercial　lead　titanate　zirconate　composition　materials.　When　the　top　and　bottom　segments　of　these　elements　vibrate　in　opposite　direction,　shearing　deformation　in　the　circumference　direction　of　a　pipe　is　obtained　and　thus　torsional　modes　are　generated.　By　an　experiment,　signals　in　the　frequency　ranged　from　40　kHz　to　230　kHz　are　excited　in　a　4　m-long　steel　pipe　with　the　developed　transducer.　Comparing　with　theoretical　results,　it　is　shown　that　the　transducer　can　excite　and　receive　the　lowest　torsional　mode　T(0,1)　mode,　in　pipes.　Furthermore,　two　completely　different　kinds　of　artificial　defects　are　detected　with　T(0,1)　mode　which　is　excited　by　the　transducer.