An emitter (120) has in a water intake part thereof a water intake amount regulating part for preventing low pressure liquid from flowing in. The water intake amount regulating part has a valve body (214) and a securing part (215). When the pressure of the liquid meant to flow into the emitter (120) is less than a set value the valve body (214) does not move with the securing part (215) preventing the liquid from flowing into the emitter (120). When the pressure of the liquid is equal to or greater than the set value the valve body (214) bends downstream to open the flow channel for the liquid.
