PURPOSE: To normally operate a blower even in case of generation of vibration on one side harmful for the other side by isolating vibration between a casing and a motor, in a blower consisting of an impeller, a casing, and a motor.

CONSTITUTION: A blower main body 1 is mounted on a common base 3 through vibration isolators 4. A motor 2 and the blower main body 1 on the common base 3 are connected together through a belt driving device 5, and the blower main body 1 is apt to be drawn and inclined to the motor 2 side by tension of the belt, but the main body 1 is restrained by a vibration isolator 4' to be able to normally operate. By this constitution, operation in the vibration isolating condition between the motor 2 and the blower main body can be performed. Therefore, even in case of generation of vibration of one side harmful for the other side, normal operation is possible.