We madetransparent arteriole membranousmodelsbyusing grayscale lithography. Weemployed asacrificial modelmadeof WAX andPVAmixture asanovelmolding material. Ourgoal istocomplement previous surgical simulators forpractice and rehearsal ofmedical treatments. Sinceblockvessel models cannot recreate moderate compliance whichissimilar tothatof therealbloodvessel, herewepropose fabrication methodfor transparent arteriole membranousmodelwhichhascircular crosssection smaller than500gim indiameter. Fabrication methodofthemodelaswellasevaluation result ofthemolding Fig.1. Surgical simulator forendovascular neurosugery, which material isreported. allows evaluating stress condition onarterial structure applied with