A beverage maker is provided including a fermentation tank module in which an opening is defined, a fermentation lid configured to open and close the opening, a temperature controller configured to control a temperature within the fermentation tank module, and a gas discharging passage connected to at least one of the fermentation tank module or the fermentation lid. The fermentation tank module may include a fermentation case, a fermentation tank which is accommodated in the fermentation case and in which an inner space that communicates with the opening is defined, and an insulator disposed between the fermentation case and the fermentation tank. The insulator is configured to surround the fermentation tank.