To prevent the adhesion of works to each other.

A barrel vessel body 20 including works, abrasive stones or the like is sunk in a water reserving tank 24 to put the water in the barrel vessel body 20. By closing the barrel vessel body by a covering member 21 in a condition that it is sunk in the water, the inside of the barrel vessel body 20 is sealed in a condition that the water is fully filled therein. Then the barrel vessel body 20 is set on a barrel polishing device to polish the works, so that the works can be polished without adhered to each other as the surface tension for adhering the works can not be produced. Accordingly the works can be uniformly polished.