PURPOSE: A vinegar maker is provided with the fermentation column filled with fibrous arriers supporting actobacters and means for forcibly passing through the vinegar mash and an oxygen-containing gas to achieve high-efficiency production of high-concentration and high-quality vinegar.

CONSTITUTION: The close type of fermentation column 1 is filled with fibrous carrier suporting actobacters 3 and both of the mash-circulating pipe 4 and the gas-circulating pipe 10 and exhaustion pipe 18 are connected thereto. The air- feeding pipe 11 is connected through valve 12 to the oxygen feeder 13 and the gas-liquid phase separator 6 to control the oxygen concentration in the gas phase in the fermentation column. Further, heating is effected through the heat exchanger 17 so that the temperature is kept at an appropriate one as the mash is fermented suitably in the column.