A catheter (100) includes a distal tip portion (80) made with resin and connected with a tip of a catheter body (10), the distal tip portion (80) including a distal lumen (81), a tip portion of the distal lumen (81) being open, and the distal lumen (81) being communicated with a lumen (31). The catheter (100) is a manualling operated microcatheter in which the external diameter of the tip of the catheter body (10) is 0.6 mm or less and the maximum external diameter of the distal tip portion (80) is 0.6 mm or less. The size of a marker (70) in an axial direction of the catheter body (10) is smaller than the maximum external diameter of the distal tip portion (80), and the length of the distal tip portion (80) in an axial direction of the distal tip portion (80) is 3 times or more and 18 times or less of the maximum external diameter of the distal tip portion (80).本發明的導管（100）具備連接於導管本體（10）的前端之樹脂製的前端末稍（80），前端末稍（80）具有前端開口之前端管腔（81），前端管腔（81）與管腔（31）連通。導管（100）係導管本體（10）的前端外徑為0.6mm以下並且前端末稍（80）的最大外徑為0.6mm以下的非主動類型的微型導管。導管本體（10）的軸向上的標記物（70）的尺寸小於前端末稍（80）的最大外徑，前端末稍（80）的軸向上的前端末稍（80）的長度為前端末稍（80）的最大外徑的3倍以上且18倍以下。
