PROBLEM TO BE SOLVED: To provide an emitter that, while the deformation volume of a film member is made smaller, can control the amount of irrigation liquid to be discharged not depending on the pressure of irrigation liquid inside a tube.SOLUTION: The present invention relates to an emitter having: a water intake part for introducing the irrigation liquid； a discharge part which is arranged facing the discharge port, and used for discharging the irrigation liquid； and a flow channel connecting the water intake part and the discharge part. The flow channel includes a flexible first diaphragm part arranged so as to partition the inside of the emitter and the inside of the tube, and has a flow rate reduction part which reduces the flow rate of the irrigation liquid depending on the deformation of the first diaphragm part corresponding to the pressure of the irrigation liquid inside the tube, and a discharge flow channel connecting the flow rate reduction part and the discharge part. The discharge flow channel has a low pressure circulation part having a large flow channel diameter and a high pressure circulation part having a small flow channel diameter.SELECTED DRAWING: Figure 5【課題】膜部材の変形量をより小さくしつつ、チューブ内の灌漑用液体の圧力によらずに吐出される灌漑用液体の量を制御することができるエミッタを提供すること。【解決手段】本発明は、前記灌漑用液体を取り入れるための取水部と、前記吐出口に面して配置され、前記灌漑用液体を吐出するための吐出部と、前記取水部および前記吐出部を繋ぐ流路と、を有するエミッタに関する。上記流路は、エミッタの内部とチューブの内部とを仕切るように配置される可撓性の第１ダイヤフラム部を含み、チューブ内の灌漑用液体の圧力に応じて、第１ダイヤフラム部が変形することにより前記灌漑用液体の流量を減少させる流量減少部と、流量減少部と前記吐出部とを繋ぐ吐出流路と、を有する。上記吐出流路は、流路径が大きい低圧流通部と流路径が小さい高圧流通部とを有する。【選択図】図５
