An endoscope comprising, an insertion section (2a), a distal end section body (2c) has an observation window (38), a liquid feed path (40), a gas feed path (39), and a nozzle (41) cleans the window (38) by jetting toward the window (38) a mixture fluid in which the liquid supplied from the liquid feed path (40) and the gas supplied from the gas feed path (39) are mixed, wherein the nozzle (41) includes, a confluent portion (42) which is provided in a mount plane in which the window (38) of the distal end section body (2c) is provided, the confluent portion (42) making confluent and mixing the liquid supplied from the liquid feed path (40) and the gas supplied from the gas feed path (39), and a jet outlet (43) which jets a gas/liquid mixture fluid, which is mixed in the confluent portion (42), toward the window (38).
