PURPOSE: To enhance polishing accuracy in a polishing device, which is used for polishing a curved surface or the like, by providing an air vent hole on a polishing bed, forming an air chamber having a shape corresponding to a polishing surface, and adjusting the negative pressure by means of a pressure source in order to set the contact pressure between the polishing bed and a body to be polished.

CONSTITUTION: A polishing bed 42 is provided with an air vent hole 6 at the same location as an air vent hole 41 for a polishing plate 4. By aligning the air vent hole 6 and with the air vent hole 41, the polishing plate 4 is fixed to the polishing bed 42. An air chamber 7, whose shape corresponds to the polishing surface of the body 1 to be polished, is formed while being communicated with the air vent hole 6. The polishing bed 42 is attached to a polishing tool 20 via a hollow, sliding shaft 44. Then, the air chamber 7 is communicated with a pressure source 46 via both a tube 27 and an air passage 28, so that the pressure of the air chamber 7 may become negative. Thus, the polishing bed 42 is attracted and press-fitted to the surface of the body 1 to be polished. Polishing work is carried out in this condition.