A vacuum cleaner comprising: a main body configured to generate a difference in air pressure; and a suction nozzle configured to suck up dust from a floor by using the difference in air pressure, wherein the suction nozzle comprises: a housing in which an inlet through which the dust moves into the main body is formed and a pressing button is mounted; a driver installed in the housing, the driver being configured to rotate a first shaft member; a rotating brush configured to rotate while engaging the first shaft member; and a detachable cover configured to rotatably support the rotating brush, wherein the detachable cover is detachably coupled to the housing by being rotated about a rotational axis of the rotating brush, and wherein the pressing button selectively blocks rotation of the detachable cover, characterized in that a third protrusion and a fourth protrusion are formed in the detachable cover, wherein the pressing button comprises: a button portion pressed by a user; a first blocking portion extending from the button portion and blocking rotation of the third protrusion about the rotational axis, a second blocking portion extending from the button portion and blocking movement of the fourth protrusion in a direction of the rotational axis, and wherein when the user presses the button portion, the first blocking portion deviates from a rotational route of the third protrusion. a main body configured to generate a difference in air pressure; and a suction nozzle configured to suck up dust from a floor by using the difference in air pressure, wherein the suction nozzle comprises: a housing in which an inlet through which the dust moves into the main body is formed and a pressing button is mounted; a driver installed in the housing, the driver being configured to rotate a first shaft member; a rotating brush configured to rotate while engaging the first shaft member; and a detachable cover configured to rotatably support the rotating brush, wherein the detachable cover is detachably coupled to the housing by being rotated about a rotational axis of the rotating brush, and a housing in which an inlet through which the dust moves into the main body is formed and a pressing button is mounted; a driver installed in the housing, the driver being configured to rotate a first shaft member; a rotating brush configured to rotate while engaging the first shaft member; and a detachable cover configured to rotatably support the rotating brush, wherein the detachable cover is detachably coupled to the housing by being rotated about a rotational axis of the rotating brush, and wherein the pressing button selectively blocks rotation of the detachable cover, characterized in that a third protrusion and a fourth protrusion are formed in the detachable cover, wherein the pressing button comprises: a button portion pressed by a user; a first blocking portion extending from the button portion and blocking rotation of the third protrusion about the rotational axis, a second blocking portion extending from the button portion and blocking movement of the fourth protrusion in a direction of the rotational axis, and a button portion pressed by a user; a first blocking portion extending from the button portion and blocking rotation of the third protrusion about the rotational axis, a second blocking portion extending from the button portion and blocking movement of the fourth protrusion in a direction of the rotational axis, and wherein when the user presses the button portion, the first blocking portion deviates from a rotational route of the third protrusion.