Abstract: A brake fluid bleeding apparatus provided with an air cylinder portion which is expandable and contractable, a pedal attachment portion disposed on an end of the air cylinder portion and detachably attached to a brake pedal of an automobile, and a contact piece portion disposed on another end side of the air cylinder portion and contact a fixation portion inside the automobile to position and fix the air cylinder portion. Further, the brake fluid bleeding apparatus is provided with a flexible air pipe portion one of which end portions is connected to an air supplying hole of the air cylinder portion and the other has an open-close valve, and a connecting portion disposed on the other end side of the air pipe portion for connection to an air supplier.