| 摘要 |
An endoscope over-tube (1) comprises: an over-tube main body (3a) which is flexible and is provided with a path through which an insertion part of an endoscope is inserted; a balloon (4) which is disposed on the outer circumference face of the leading end side of the over-tube main body (30a) and can be expanded and contracted in the over-tube diameter direction; at least one gas supply tube path (6) which is disposed within the over-tube main body (3a) in parallel with the path, and which carries out supply and removal of a gas within the balloon (4); and a first connector part (5) for connecting a gas supply source for providing a gas to the gas supply tube path (6).
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