A medical overtube (1) includes a multi-lumen tube (3) provided with a plurality of lumens (2) through which medical devices are to be passed； a braided tube (4) which covers an outer side of the multi-lumen tube (3) and is made of braided fibers； and an outer tube (5) that covers an outer side of the braided tube (4), wherein a through hole (7) is formed in the multi-lumen tube (3) or the outer tube (5), the through hole (7) is configured to connect a space, which is covered by the outer tube (5) and the multi-lumen tube (3) and in which the braided tube (4) is disposed, to an exterior.
