A drip irrigation emitter for controlling an amount of irrigation liquid ejected through an ejection port of a flow pipe through which the irrigation liquid flows, the ejection port extending through a pipe wall of the flow pipe, wherein the drip irrigation emitter is disposed on inner peripheral surface of tube main body at a position corresponding to ejection port for irrigation liquid, so as to cover ejection port, the drip irrigation emitter comprising: a flow channel that allows the irrigation liquid to flow from an inside of the flow pipe to the ejection port when the drip irrigation emitter is disposed at a position corresponding to the ejection port in an inner peripheral surface of the flow pipe; an inflow part for introducing the irrigation liquid in the flow pipe into the flow channel; a pressure reduction channel part disposed on a downstream side relative to the inflow part in the channel, the pressure reduction channel part being configured to define a pressure reduction channel, the pressure reduction channel, being configured to allow the irrigation liquid entered from the inflow part to flow therethrough toward the ejection port while reducing a pressure of the irrigation liquid; a first plane to be connected to the inner peripheral surface of the flow pipe; and a second plane to be located on a central axis side of the flow pipe relative to the first plane, wherein the inflow part is disposed at the second plane, has hydrophobicity, and prevents the irrigation liquid having a liquid pressure lower than a predetermined liquid pressure from introducing into the flow channel,the inflow part includes a substrate part and a plurality of inlets extending through the substrate part; the substrate part includes a front surface included in the second plane, and a rear surface facing the channel; and, at least the front surface has hydrophobicity; the drip irrigation emitter characterized in that hydrophobic coating is applied to the inflow part. a flow channel that allows the irrigation liquid to flow from an inside of the flow pipe to the ejection port when the drip irrigation emitter is disposed at a position corresponding to the ejection port in an inner peripheral surface of the flow pipe; an inflow part for introducing the irrigation liquid in the flow pipe into the flow channel; a pressure reduction channel part disposed on a downstream side relative to the inflow part in the channel, the pressure reduction channel part being configured to define a pressure reduction channel, the pressure reduction channel, being configured to allow the irrigation liquid entered from the inflow part to flow therethrough toward the ejection port while reducing a pressure of the irrigation liquid; a first plane to be connected to the inner peripheral surface of the flow pipe; and a second plane to be located on a central axis side of the flow pipe relative to the first plane, wherein the inflow part is disposed at the second plane, has hydrophobicity, and prevents the irrigation liquid having a liquid pressure lower than a predetermined liquid pressure from introducing into the flow channel,the inflow part includes a substrate part and a plurality of inlets extending through the substrate part; the substrate part includes a front surface included in the second plane, and a rear surface facing the channel; and, at least the front surface has hydrophobicity; the drip irrigation emitter characterized in that hydrophobic coating is applied to the inflow part.