A water passing portion in which a plurality of water spray holes are formed in a predetermined pattern in a longitudinal direction is provided, and in the water passing portion, the irrigation tubes are installed as the plurality of water spraying holes, and the water passing portion Vertical sprinkling holes extending along the radial direction of the vertical cross section of the water passing portion and non-perpendicular sprinkling holes extending so as not to extend along the radial direction are formed at predetermined positions in a state where water is expanded and expanded Irrigation tubes that have been.複数の散水孔が長手方向に所定のパターンで形成された通水部を備え、前記通水部には、前記複数の散水孔として、前記灌水チューブが設置されて前記通水部の内部に通水されて膨らんでいる状態で、前記通水部の垂直断面の径方向に沿うように延びる垂直散水孔と、前記径方向に沿わないように延びる非垂直散水孔とが、所定の位置に形成されてなる灌水チューブ。
