PROBLEM TO BE SOLVED: To provide a method for producing carbonic acid-containing jelly beverage in an industrial production line, directly pressing by an inline method, carbonic dioxide in a jelly beverage prepared liquid with a gelling agent heat melted and having a temperature zone avoiding gelatinization.SOLUTION: The method for producing the carbonic acid-containing jelly beverage includes pressing by an inline method, carbon dioxide in a jelly beverage preparation liquid with a gelling agent heat melted and having 35-80°C liquid temperature by bringing a carbon dioxide pressure in this time to equal to or below a pressure to maximize carbon dioxide solubility in the liquid temperature of the preparation liquid, sending the liquid to a buffer tank by bringing a buffer tank pressure in this time to the 9/10 or above of the carbon dioxide pressure and 0.5 MPa, or below sending the liquid to a head tank by bringing a head tank pressure in this time to the carbon dioxide pressure and the buffer tank pressure or above and 0.5 MPa or below, and filling/sealing the liquid in a container followed by cooling to gelatinize the content liquid.
