Oral cleansing device (10) includes tank (40) for storing a cleaning fluid, cleansing unit (100) having exhaust port (810) that discharges the cleaning fluid, cleansing duct (60) for communicating between tank (40) and exhaust port (810), pump (30) for sucking the cleaning fluid stored in tank (40) with a negative pressure and discharging the sucked cleaning fluid to exhaust port (810), and suction duct (70) for supplying air to cleansing duct (60). Suction duct (70) is connected to downstream cleansing duct (62) that is a part of duct (60) and is located on a downstream side from pump (30) such that air can be sucked into cleansing duct (60) with a negative pressure produced by pump (30). This structure allows oral cleansing device (10) to give a pleasant stimulus to gums.
