PROBLEM TO BE SOLVED: To provide a male connector capable of being connected to a plurality of kinds of female connectors while satisfying tensile properties, pressure resistant properties, and insertion easiness.SOLUTION: This male connector 1A includes a tubular part 20 inserted into a female connector. The outer circumferential surface of the tubular part is formed with a tapered surface 27 such that the outside diameter of the tubular part becomes smaller as it goes to the tip 20t side of the tubular part in a prescribed area from the tip to the base end. Furthermore, the outer circumferential surface of the tubular part is formed with: at least one projecting line 25 continuing in the circumferential direction and one or more recessed ilnes 21, 22, and 23 continuing in the circumferential direction.COPYRIGHT: (C)2012,JPO&INPIT【課題】複数種類のメス型コネクタに対して、引っ張り特性、耐圧特性、挿入容易性を満足しながら接続することができるオス型コネクタを提供する。【解決手段】オス型コネクタ1Aはメス型コネクタに挿入される管状部20を備える。管状部の外周面には、管状部の先端20t側ほど外径が小さくなるテーパ面27が、先端から基端に向20bかって所定領域内に形成されている。更に、管状部の外周面には、周方向に連続する少なくとも1つの凸条25と、周方向に連続する少なくとも1つの凹条21,22,23とが形成されている。【選択図】図2