To provide an endoscope or the like capable of realizing a large raising angle.The endoscope includes: a channel outlet open to a distal end side of an insertion portion； a raising base capable of raising a treatment tool protruding from the channel outlet； and a curved portion which protrudes from a peripheral edge portion of the channel outlet toward the distal end side of the insertion portion and is capable of coming into contact with the treatment tool raised by the raising base. The raising base presses the treatment tool on the distal end side of a contact portion between the treatment tool and the curved portion.
