PURPOSE: To make it possible to carry out continuous operation for production of edible vinegar in high concentration and quality for a long time, by placing a support having a buckling strength in a fibrous carrier having adhered acetic acid bacteria in fermenting unrefined edible vinegar using the above-mentioned carrier in a fermentation column.

CONSTITUTION: A support having a buckling strength in the from of a net, perforated, plate, plate or film, etc., made of plastic, stainless steel, etc., is integrally engaged and placed in a fibrous carrier and the supported carrier is filled in a fermentation column through which a liquid can be passed to adhere acetic acid bacteria thereto. Unrefined vinegar and an oxygen-containing gas are forced to pass and come into contact with the above-mentioned carrier to carry out fermentation and produce the aimed edible vinegar.