OVER TUBE

摘要

One embodiment of an overtube, according to the present invention, includes a first module which has a hollow part formed in an axis direction and includes a bent part; a channel part which is combined with the first module on the front surface of the first module and has a through hole into which a diagnosis tool is inserted; and second modules which are combined with the back surface of the first module, have a hollow part in an axis direction, include a bent part, and are combined with each other.