Provided is a long medical body that can suppress torque in the axial direction while maintaining high flexibility and can smoothly transmit torque even in a bent state. A long body for medical use 10 having a tubular body 70, the tubular body 70 has a slit 71 extending in a spiral manner while meandering, and the slit 71 forms a pair of first opposing surface 100 and second. The first facing surface 100 forms a distal first convex portion 101 projecting in the axial direction, and the second facing surface 110 forms a distal first convex portion 101. A surrounding first proximal concave portion 112 is formed, a distal first convex portion 101 forms a distal second convex portion 103 projecting in the circumferential direction, and a proximal first concave portion 112 is formed. A proximal second concave portion 114 surrounding the distal second convex portion 103 is formed. [Selection] Figure 4【課題】高い柔軟性を保持しつつ軸方向への伸びを抑制し、かつ曲げた状態であっても滑らかにトルクを伝達できる医療用長尺体を提供する。【解決手段】管状体７０を有する医療用長尺体１０であり、管状体７０は蛇行しつつ螺旋状に延びるスリット７１を有し、スリット７１は対をなす第１の対向面１００、第２の対向面１１０から形成され、第１の対向面１００は軸方向へ突出する遠位側第１の凸部１０１を形成し、第２の対向面１１０は遠位側第１の凸部１０１を囲む近位側第１の凹部１１２を形成し、遠位側第１の凸部１０１は周方向へ突出する遠位側第２の凸部１０３を形成し、近位側第１の凹部１１２は遠位側第２の凸部１０３を囲む近位側第２の凹部１１４を形成する。【選択図】図４
