Patent ID: 8182759

Claim:
A liquid supply mouthpiece, comprising: a first channel member in which a projection portion of the first channel member abuts on a fitting surface in a channel mouthpiece of an endoscope, and a first channel internally provided communicates with an endoscope channel in the channel mouthpiece when the liquid supply mouthpiece is fitted onto the channel mouthpiece of the endoscope, the projection portion projecting from an opposing surface opposed to the fitting surface toward the channel mouthpiece of the endoscope, and the fitting surface being opposed to the liquid supply mouthpiece; a second channel member which is fitted on and fixed to an outer periphery of the first channel member and is internally provided with a second channel which communicates with the first channel; a pressing member which is provided in the second channel, and presses the first channel member toward the channel mouthpiece of the endoscope in the second channel when the liquid supply mouthpiece is fitted to the channel mouthpiece of the endoscope; and a liquid introduction port which is formed in the second channel member and introduces the liquid into the second channel.