PROBLEM TO BE SOLVED: To provide a puncture needle device for ultrasonic endoscope which can accurately recognize a puncture needle by using ultrasonic waves without generating high frictional resistance between the puncture needle and a sheath, when the puncture needle having fine unevenness on the outer peripheral surface is inserted with the sheath in an inner tubular path of the ultrasonic endoscope whose part near the distal end is inflected.SOLUTION: The puncture needle device for ultrasonic endoscope includes: an unevenness-forming region 53 having fine unevenness formed at least one part of a region opposite to an ultrasonic probe 12 on the outer peripheral surface of a puncture needle 5 and uneven non-forming region 54 without having the fine unevenness, formed at least one part of a region facing the ultrasonic probe of the outer peripheral surface.COPYRIGHT: (C)2012,JPO&INPIT【課題】超音波内視鏡の先端近傍部が屈曲している内部管路に外周面に微小凹凸を有する穿刺針とシースを一緒に挿通したときに、穿刺針とシースの間に大きな摩擦抵抗を発生させることなく、穿刺針を超音波を利用して正確に認識できる超音波内視鏡用穿刺針装置を提供する。【解決手段】穿刺針51の外周面の超音波プローブ12と反対側の領域の少なくとも一部に形成した、微小凹凸を具備する凹凸形成領域53と、該外周面の超音波プローブと対向する領域の少なくとも一部に形成した、該微小凹凸を具備しない凹凸非形成領域54と、を設けた。【選択図】図12
