A nozzle of a cleaner comprising: a housing ; a rotation cleaning unit which is accommodated in the housing and cleans a surface to be cleaned by a rotation operation thereof; and a drive unit which is inserted into a side of the rotation cleaning unit to rotate the rotation cleaning unit, wherein the drive unit includes a motor which generates a driving force, and a motor supporter which is fixed to the housing and to which the motor is coupled, , wherein a printed circuit board, PCB, installation portion in which a PCB is installed and which is spaced apart from the motor supporter is provided in the motor, and wherein a first space portion in which the air flows is formed between the motor supporter and the PCB installation portion , characterized in that the drive unit further includes: a gear unit which is connected to a rotation shaft of the motor to transfer a driving force, and a shaft which is connected to the gear unit and the rotation cleaning unit to transfer a rotation force to the rotation cleaning unit ; and the housing includes: a main body portion in which the rotation cleaning unit is accommodated and to which the motor supporter is fixed; and a side cover which is coupled to the main body portion and covers at least a portion of the drive unit , and wherein the motor supporter is disposed between the motor and the side cover . a housing ; a rotation cleaning unit which is accommodated in the housing and cleans a surface to be cleaned by a rotation operation thereof; and a drive unit which is inserted into a side of the rotation cleaning unit to rotate the rotation cleaning unit, wherein the drive unit includes a motor which generates a driving force, and a motor supporter which is fixed to the housing and to which the motor is coupled, , a motor which generates a driving force, and a motor supporter which is fixed to the housing and to which the motor is coupled, , wherein a printed circuit board, PCB, installation portion in which a PCB is installed and which is spaced apart from the motor supporter is provided in the motor, and wherein a first space portion in which the air flows is formed between the motor supporter and the PCB installation portion , characterized in that the drive unit further includes: a gear unit which is connected to a rotation shaft of the motor to transfer a driving force, and a shaft which is connected to the gear unit and the rotation cleaning unit to transfer a rotation force to the rotation cleaning unit ; and the housing includes: a main body portion in which the rotation cleaning unit is accommodated and to which the motor supporter is fixed; and a side cover which is coupled to the main body portion and covers at least a portion of the drive unit , and wherein the motor supporter is disposed between the motor and the side cover . a gear unit which is connected to a rotation shaft of the motor to transfer a driving force, and a shaft which is connected to the gear unit and the rotation cleaning unit to transfer a rotation force to the rotation cleaning unit ; and the housing includes: a main body portion in which the rotation cleaning unit is accommodated and to which the motor supporter is fixed; and a side cover which is coupled to the main body portion and covers at least a portion of the drive unit , and wherein the motor supporter is disposed between the motor and the side cover . a main body portion in which the rotation cleaning unit is accommodated and to which the motor supporter is fixed; and a side cover which is coupled to the main body portion and covers at least a portion of the drive unit , and wherein the motor supporter is disposed between the motor and the side cover . <EOS>