Combination of an endoscope and a sheath for covering an inserting tube
of the endoscope, the sheath includes an elastic tubular member having an open
proximal end and a closed distal end, and the endoscope is provided with an air
feeding tube for feeding air from a distal end of the inserting tube to inflate
the tubular member when the inserting tube is inserted into the tubular member
to be covered therewith.
