To provide a clogging-free emitter which can be easily manufactured and used for spewing out various kinds of liquid.

A liquid level control plate 42 which includes a channel for storing a liquid with a single opening and has a bottom face flush with the open face in the channel, is mounted on separated side walls and above an open face. The liquid level control plate 42 has a thickness and a top face and further, an aperture 42 having an inlet edge 46. In addition, the aperture 52 has an aperture width and an inlet edge 46, and the inlet edge 46 is structurally arranged in such a manner that the meniscus of the liquid stored in the channel is substantially held in the opening of the channel.