A disposable cystoscope sheath for use with an endoscope includes an endoscope channel (2) and an operating channel (3)，which are arranged inside the cystoscope sheath. The endoscope channel (2) and the operating channel (3) abut against each other in parallel, with inner cavities thereof communicating with each other. The endoscope channel (2) made of medical rigid plastic has an oval-shaped cross-section with a recess, and the axial edge of the recess is connected with the axial edge of the recess of the cross-section of the operating channel (3). The operating channel (3) is made of soft material such as silica gel.
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