A cleaner comprising: a rotary plate; a cloth that is attached to a bottom of the rotary plate and that is configured to receive water; a rotation driving unit that is connected to an upper portion of the rotary plate and that is configured to rotate the rotary plate about an axis that is perpendicular to the rotary plate; a storage unit that is configured to store water; a collecting unit that is configured to collect water from the cloth and that is configured to provide water to an upper side of the storage unit; a filter unit that is configured to filter water that is collected by the collecting unit; a water supply unit that is configured to receive water from a lower portion of the storage unit and that is configured to provide water to the cloth; a vacuum motor that is configured to move water from the storage unit through the collecting unit; and a pump that is configured to move water through the water supply unit, wherein the water supply unit includes: a main pipe that is connected to the storage unit and that is configured to guide water from the storage unit to a center of the rotary plate; and a dispersion pipe (53; 153; 253; 353) that is connected to the main pipe, that is configured to disperse water guided by the main pipe in the diameter direction of the rotary plate, and that defines a plurality of dispersion holes, wherein the rotary plate defines a plurality of supply holes (18; 418; 518) that are configured to supply water to the cloth. a rotary plate; a cloth that is attached to a bottom of the rotary plate and that is configured to receive water; a rotation driving unit that is connected to an upper portion of the rotary plate and that is configured to rotate the rotary plate about an axis that is perpendicular to the rotary plate; a storage unit that is configured to store water; a collecting unit that is configured to collect water from the cloth and that is configured to provide water to an upper side of the storage unit; a filter unit that is configured to filter water that is collected by the collecting unit; a water supply unit that is configured to receive water from a lower portion of the storage unit and that is configured to provide water to the cloth; a vacuum motor that is configured to move water from the storage unit through the collecting unit; and a pump that is configured to move water through the water supply unit, wherein the water supply unit includes: a main pipe that is connected to the storage unit and that is configured to guide water from the storage unit to a center of the rotary plate; and a dispersion pipe (53; 153; 253; 353) that is connected to the main pipe, that is configured to disperse water guided by the main pipe in the diameter direction of the rotary plate, and that defines a plurality of dispersion holes, wherein the rotary plate defines a plurality of supply holes (18; 418; 518) that are configured to supply water to the cloth. a main pipe that is connected to the storage unit and that is configured to guide water from the storage unit to a center of the rotary plate; and a dispersion pipe (53; 153; 253; 353) that is connected to the main pipe, that is configured to disperse water guided by the main pipe in the diameter direction of the rotary plate, and that defines a plurality of dispersion holes, wherein the rotary plate defines a plurality of supply holes (18; 418; 518) that are configured to supply water to the cloth.