A cleaner including a cleaner body; and a rotatable drum, the drum including a drum body including a first tapered portion having a diameter decreasing from a first end of the drum body, a second tapered portion having a diameter that decreasing from a second end of the drum body, and a collecting portion at a position where the diameter of the first and second tapered portions are smallest, and a brush member extending between the first and second ends of, and protruding outwardly from, the drum body, wherein the drum is configured so that a distance from the longitudinal axis of the drum to an end tip of the brush member is maintained across the first and second tapered portions and the collecting portion, and rotation of the drum guides intake of foreign substances into the cleaner body, and foreign substances wound about the drum toward the collecting portion.