Disclosed is a sanitary tampon including: an applicator composed of an outer tube having a front nose and a rear opening and a pusher inserted into the outer tube through the rear opening; and a tampon body contained in the outer tube and allowed to come out of the front nose when pushed by the pusher. The outer tube is provided with marks which serve as a measure of insertion distance of the outer tube into the vaginal cavity of a user. The marks are spaced away from the front nose of the outer tube.