Patent ID: 8235889

Claim:
An endoscope comprising: an insertion portion to be inserted into a body cavity; an operation portion provided continuously from a proximal end side of the insertion portion; a cylinder in which a gas to be fed to the distal end of the insertion portion is compressed, filled, and stored, the cylinder being detachably attached to the operation portion; a water-feeding unit that houses a liquid to be fed to the distal end of the insertion portion, the water-feeding unit being detachably attached to the operation portion; a case that fully encloses the cylinder and the water-feeding unit; and a coupling member that is attached to the case; wherein a lower end of the coupling member is attached to openings of the cylinder and the water-feeding unit, and an upper end of the coupling member is directly attached to the operation portion; wherein the liquid in the water-feeding unit is fed by feeding the gas in the cylinder to the water-feeding unit; wherein the water-feeding unit comprises a pouched member which is filled with the liquid, the pouched member having an inner capacity that can be reduced; and wherein the water-feeding unit feeds the liquid by increasing the external pressure of the pouched member by the gas in the cylinder.