Patent ID: 7914441

Claim:
An endoscope, comprising: an insertion portion which has a distal end hard portion at a distal end side and a treatment instrument insertion channel inside, and is insertable into a body cavity; an operation portion which is connected to a proximal end side of the insertion portion; and a treatment instrument raiser which is arranged near a distal end side opening of the treatment instrument insertion channel in the insertion portion, has a treatment instrument guiding surface for guiding a treatment instrument, and able to rise according to an operation from the operation portion, wherein the treatment instrument raiser includes a slit which is formed on a distal end portion of the treatment instrument guiding surface and with which a guide wire guided toward the distal end side opening of the treatment instrument insertion channel can be engaged, the guide wire being configured for guiding a treatment instrument inserted into the treatment instrument insertion channel, and a guide wire guiding unit which is formed on an outer periphery, other than on the distal end portion where the slit is formed, of the treatment instrument guiding surface and serves to guide the guide wire into the slit, the outer periphery being a portion where a side surface of the treatment instrument raiser is intersected with the treatment instrument guiding surface, the guide wire guiding unit including a protrusion formed on a portion of the outer periphery of the treatment instrument guiding surface and upwardly extending therefrom, the protrusion being configured to prevent slippage of the guide wire from the treatment instrument guiding surface, and wherein the guide wire is configured to be guided into the slit by the guide wire guiding unit, when the treatment instrument raiser is raised by the operation from the operation portion.