A sheathed endoscope, includes: an endoscope and a disposable component. The disposable compartment protects the inner and outer surfaces of the endoscope. The disposable compartment includes: a cap of endoscope tip in the distal end of endoscope, a disposable tube for biopsy forceps, and an outside sheath capsule for endoscope shaft. The tip cap connects the sheath capsule and the disposable tube for biopsy forceps. There are multiple windows set on the lateral side of endoscope tip, wherein pills containing transparent fluid are placed somewhere in between of the tip cap and the distal end of endoscope. The pills will be crushed by co-fraction of the tip cap and the distal end of endoscope, to release the transparent fluid to fill in the space formed between the tip cap and the distal end of the endoscope. This disposable sheath compartment in the invention will cover all surfaces of the endoscope with disposable material, preventing contaminations on endoscope during endoscopy, meanwhile there is anti-glaring design, to prevent producing of glaring in the space formed between the tip cap and the distal end of endoscope.