Disclosed is a drainage tube that includes: a conduit member which has a first end, a second end, and a drainage passage disposed between the two ends. The first end is inserted into a diseased part of a Bartholins duct abscess through an incision. A first wing member is provided on an outer circumference at a side of the first end and prevents the conduit member inserted into the diseased part from being separated. A second wing member is provided on the outer circumference at a side of the second end and restricts the depth to which the conduit member is inserted into the diseased part. Pus or the like may be smoothly drained from the diseased part while the incision heals.
