A robot cleaner comprising: a main body; a suction motor to generate a suction force, the suction motor provided in the main body; and a dust collector (100, 200, 300) to collect dust contained in air suctioned by the suction motor, the dust collector (100, 200, 300) being removably coupled to the main body; wherein the dust collector (100, 200, 300) comprises: a first chamber (110, 210) to which the air, which is suctioned into the main body by the suction motor, is introduced, the first chamber (110, 210) comprising: a filter (150, 250,350) to filter out dust in the suctioned air, and a dust remover (160, 260, 360) configured to automatically remove dust attached to the filter (150, 250, 350); and a second chamber (120, 220, 320) arranged side by side with the first chamber (110, 210), the second chamber (120, 220, 320) comprising: a connection port (141, 340) to which air, which is filtered by the filter (150, 250, 350) in the first chamber (110, 210), is introduced, and a cyclone dust separator (170, 270 370) to separate dust from the introduced air. a main body; a suction motor to generate a suction force, the suction motor provided in the main body; and a dust collector (100, 200, 300) to collect dust contained in air suctioned by the suction motor, the dust collector (100, 200, 300) being removably coupled to the main body; wherein the dust collector (100, 200, 300) comprises: a first chamber (110, 210) to which the air, which is suctioned into the main body by the suction motor, is introduced, the first chamber (110, 210) comprising: a filter (150, 250,350) to filter out dust in the suctioned air, and a dust remover (160, 260, 360) configured to automatically remove dust attached to the filter (150, 250, 350); and a second chamber (120, 220, 320) arranged side by side with the first chamber (110, 210), the second chamber (120, 220, 320) comprising: a connection port (141, 340) to which air, which is filtered by the filter (150, 250, 350) in the first chamber (110, 210), is introduced, and a cyclone dust separator (170, 270 370) to separate dust from the introduced air. a first chamber (110, 210) to which the air, which is suctioned into the main body by the suction motor, is introduced, the first chamber (110, 210) comprising: a filter (150, 250,350) to filter out dust in the suctioned air, and a dust remover (160, 260, 360) configured to automatically remove dust attached to the filter (150, 250, 350); and a filter (150, 250,350) to filter out dust in the suctioned air, and a dust remover (160, 260, 360) configured to automatically remove dust attached to the filter (150, 250, 350); and a second chamber (120, 220, 320) arranged side by side with the first chamber (110, 210), the second chamber (120, 220, 320) comprising: a connection port (141, 340) to which air, which is filtered by the filter (150, 250, 350) in the first chamber (110, 210), is introduced, and a cyclone dust separator (170, 270 370) to separate dust from the introduced air. a connection port (141, 340) to which air, which is filtered by the filter (150, 250, 350) in the first chamber (110, 210), is introduced, and a cyclone dust separator (170, 270 370) to separate dust from the introduced air.