PROBLEM TO BE SOLVED: To provide a piercing adapter used for piercing a puncture needle by means of an ultrasonic probe with an insertion section to be inserted into the living body which guides a puncture needle stably and facilitates removal of the puncture needle, and also to provide an ultrasonic probe.SOLUTION: The piercing adapter 3 has a first cylindrical member 31 having a notch on its cross section. The notch extends from one end to the other end of the first cylindrical member and has a width larger at least than a guide groove 11 of the ultrasonic probe 1. The first cylindrical member is arranged on the outside of the insertion section to cover the guide groove and to be freely rotatable circumferentially along the insertion section.COPYRIGHT: (C)2008,JPO&INPIT【課題】生体内に挿入する挿入部有する超音波プローブを用いて穿刺針の刺入を行うときに、穿刺針の案内を安定して行うことが可能で、さらに、穿刺針を容易に外すことが可能な穿刺アダプタ及び超音波プローブを提供すること。【解決手段】穿刺アダプタ3は、断面が切り欠きを有する第1の筒状部材31を有し、切り欠きは第1の筒状部材の一端側から他端側に亘り且つ少なくとも超音波プローブ1のガイド溝11の幅より広い幅に切り欠かれ、第1の筒状部材は挿入部の外側に接してガイド溝を覆うように装着され、且つその周方向に回動自在に装着されることを特徴とする。【選択図】図1
