Cleaning unit for suction head, comprising: - a rotating brush that is mobile in rotation about an axis of rotation and that is configured to be detachably mounted in a receiving recess delimited by a main body of the suction head, and - a closing plug that is configured to at least partially close a passage opening provided on the main body and through which the rotating brush is able to be introduced into the receiving recess and withdrawn outside the receiving recess, the rotating brush being rotative with respect to the closing plug, the closing plug comprising a plug body and means of locking configured to lock the plug body on the main body, the means of locking comprising at least one locking member that is movable with respect to the plug body between a locking position wherein the at least one locking member cooperates with at least one locking element provided on the main body in such a way as to prevent a withdrawal of the rotating brush outside the receiving recess a releasing position wherein the at least one locking member releases the at least one locking element in such a way as to authorise a withdrawal of the rotating brush outside the receiving recess, the closing plug comprising an actuating member that can be displaced between a first actuating position and a second actuating position, characterised in that the actuating member comprises at least one cam surface (23.1, 23.2), and in that the at least one locking member comprises at least one contact surface that contacts the cam surface (23.1, 23.2) and which is configured to be displaced along the cam surface (23.1, 23.2) in such a way that when the actuating member is displaced between the first actuating position and the second actuating position, the contact surface is displaced along the cam surface (23.1, 23.2) to drive a displacement of the at least one locking member between the releasing position and the locking position. - a rotating brush that is mobile in rotation about an axis of rotation and that is configured to be detachably mounted in a receiving recess delimited by a main body of the suction head, and - a closing plug that is configured to at least partially close a passage opening provided on the main body and through which the rotating brush is able to be introduced into the receiving recess and withdrawn outside the receiving recess, the rotating brush being rotative with respect to the closing plug, the closing plug comprising a plug body and means of locking configured to lock the plug body on the main body, the means of locking comprising at least one locking member that is movable with respect to the plug body between a locking position wherein the at least one locking member cooperates with at least one locking element provided on the main body in such a way as to prevent a withdrawal of the rotating brush outside the receiving recess a releasing position wherein the at least one locking member releases the at least one locking element in such a way as to authorise a withdrawal of the rotating brush outside the receiving recess, the closing plug comprising an actuating member that can be displaced between a first actuating position and a second actuating position, characterised in that the actuating member comprises at least one cam surface (23.1, 23.2), and in that the at least one locking member comprises at least one contact surface that contacts the cam surface (23.1, 23.2) and which is configured to be displaced along the cam surface (23.1, 23.2) in such a way that when the actuating member is displaced between the first actuating position and the second actuating position, the contact surface is displaced along the cam surface (23.1, 23.2) to drive a displacement of the at least one locking member between the releasing position and the locking position. the means of locking comprising at least one locking member that is movable with respect to the plug body between a locking position wherein the at least one locking member cooperates with at least one locking element provided on the main body in such a way as to prevent a withdrawal of the rotating brush outside the receiving recess a releasing position wherein the at least one locking member releases the at least one locking element in such a way as to authorise a withdrawal of the rotating brush outside the receiving recess, the closing plug comprising an actuating member that can be displaced between a first actuating position and a second actuating position, characterised in that the actuating member comprises at least one cam surface (23.1, 23.2), and in that the at least one locking member comprises at least one contact surface that contacts the cam surface (23.1, 23.2) and which is configured to be displaced along the cam surface (23.1, 23.2) in such a way that when the actuating member is displaced between the first actuating position and the second actuating position, the contact surface is displaced along the cam surface (23.1, 23.2) to drive a displacement of the at least one locking member between the releasing position and the locking position.