An emitter for quantitatively discharging irrigation liquid in a tube for distributing the irrigation liquid from a discharge port communicating between an inside and an outside of the tube when the emitter is joined to an inner wall surface of the tube at a position corresponding to the discharge port, the emitter being composed of a resin molded body including at least a recess and a through hole, the emitter comprising: an intake part for receiving the irrigation liquid in the tube; a liquid receiving amount regulating part for regulating a flow rate of the irrigation liquid received from the intake part in accordance with a pressure of the irrigation liquid in the intake part; a pressure reduction part for allowing the irrigation liquid supplied from the liquid receiving amount regulating part to flow therethrough while reducing the pressure of the irrigation liquid; a discharge rate regulating part for regulating the flow rate of the irrigation liquid supplied from the pressure reduction part in accordance with a pressure of the irrigation liquid in the tube; and a discharge part to which the irrigation liquid, having a flow rate regulated by the discharge rate regulating part, is supplied, the discharge part configured to face the discharge port, wherein: the intake part includes a screen part for catching a floating material in the irrigation liquid, the screen part includes: a slit which opens to an inside of the tube, a recess in communication with the slit, and a plurality of protrusion lines disposed in the recess, the plurality of protrusion lines extending in a direction intersecting with the longitudinal direction of the slit; and the discharge part includes an intrusion prevention part for preventing intrusion of foreign matter from the discharge port. an intake part for receiving the irrigation liquid in the tube; a liquid receiving amount regulating part for regulating a flow rate of the irrigation liquid received from the intake part in accordance with a pressure of the irrigation liquid in the intake part; a pressure reduction part for allowing the irrigation liquid supplied from the liquid receiving amount regulating part to flow therethrough while reducing the pressure of the irrigation liquid; a discharge rate regulating part for regulating the flow rate of the irrigation liquid supplied from the pressure reduction part in accordance with a pressure of the irrigation liquid in the tube; and a discharge part to which the irrigation liquid, having a flow rate regulated by the discharge rate regulating part, is supplied, the discharge part configured to face the discharge port, wherein: the intake part includes a screen part for catching a floating material in the irrigation liquid, the screen part includes: a slit which opens to an inside of the tube, a recess in communication with the slit, and a plurality of protrusion lines disposed in the recess, the plurality of protrusion lines extending in a direction intersecting with the longitudinal direction of the slit; and the discharge part includes an intrusion prevention part for preventing intrusion of foreign matter from the discharge port. the intake part includes a screen part for catching a floating material in the irrigation liquid, the screen part includes: a slit which opens to an inside of the tube, a recess in communication with the slit, and a plurality of protrusion lines disposed in the recess, the plurality of protrusion lines extending in a direction intersecting with the longitudinal direction of the slit; and a slit which opens to an inside of the tube, a recess in communication with the slit, and a plurality of protrusion lines disposed in the recess, the plurality of protrusion lines extending in a direction intersecting with the longitudinal direction of the slit; and the discharge part includes an intrusion prevention part for preventing intrusion of foreign matter from the discharge port.