A vacuum cleaner comprising: a main body configured to generate a difference in air pressure; and a suction nozzle configured to suck dust on a floor by using the difference in air pressure, wherein the suction nozzle comprises: a housing having an inlet through which the dust moves to the main body , the housing being configured such that a driver is installed therein; and a rotating brush configured to rotate to push dust on the floor toward the inlet , and wherein the rotating brush comprises: a first rotating brush to which the driver transmits a rotational motion; a second rotating brush rotatably mounted in the housing ; and a coupler configured to couple the first and second rotating brushes so that rotation axes of the first and second rotating brushes are positioned on the same line, characterised in that the first and second rotating brushes comprise: cylindrical bodies being in contact with each other in a direction of the rotation axis to define a contact surface; and brush members respectively attached to outer surfaces of the bodies . a main body configured to generate a difference in air pressure; and a suction nozzle configured to suck dust on a floor by using the difference in air pressure, wherein the suction nozzle comprises: a housing having an inlet through which the dust moves to the main body , the housing being configured such that a driver is installed therein; and a rotating brush configured to rotate to push dust on the floor toward the inlet , and wherein the rotating brush comprises: a first rotating brush to which the driver transmits a rotational motion; a second rotating brush rotatably mounted in the housing ; and a coupler configured to couple the first and second rotating brushes so that rotation axes of the first and second rotating brushes are positioned on the same line, characterised in that the first and second rotating brushes comprise: cylindrical bodies being in contact with each other in a direction of the rotation axis to define a contact surface; and brush members respectively attached to outer surfaces of the bodies . a housing having an inlet through which the dust moves to the main body , the housing being configured such that a driver is installed therein; and a rotating brush configured to rotate to push dust on the floor toward the inlet , and wherein the rotating brush comprises: a first rotating brush to which the driver transmits a rotational motion; a second rotating brush rotatably mounted in the housing ; and a coupler configured to couple the first and second rotating brushes so that rotation axes of the first and second rotating brushes are positioned on the same line, characterised in that the first and second rotating brushes comprise: cylindrical bodies being in contact with each other in a direction of the rotation axis to define a contact surface; and brush members respectively attached to outer surfaces of the bodies . a first rotating brush to which the driver transmits a rotational motion; a second rotating brush rotatably mounted in the housing ; and a coupler configured to couple the first and second rotating brushes so that rotation axes of the first and second rotating brushes are positioned on the same line, characterised in that the first and second rotating brushes comprise: cylindrical bodies being in contact with each other in a direction of the rotation axis to define a contact surface; and brush members respectively attached to outer surfaces of the bodies . cylindrical bodies being in contact with each other in a direction of the rotation axis to define a contact surface; and brush members respectively attached to outer surfaces of the bodies . <EOS>