A method for manufacturing a thickened carbonated beverage packed in a container, said method comprising: mixing an aqueous solution of a first thickener at a temperature of 0-35 DEG C with a second thickener, which is insoluble in water at 0-35 DEG C but soluble in water at 60 DEG C or higher, to give a stock liquid in which the second thickener is dispersed in the aqueous solution； dissolving carbon dioxide gas in the stock liquid to give a carbonated aqueous solution； filling the carbonated aqueous solution into a container and sealing the container to give the carbonated aqueous solution packed in the container； and then heating the carbonated aqueous solution packed in the container in such a manner that the carbonated aqueous solution attains a temperature of 60 DEG C or higher to thereby dissolve the second thickener in the carbonated aqueous solution.一種容器填裝濃稠碳酸飲料之製造方法，其包含：將具有0～35℃的溫度之第1增黏劑的水溶液與不溶解於0～35℃的水但可溶於60℃以上的水之第2增黏劑進行混合，而獲得前述第2增黏劑分散於前述水溶液中而得之原液；使二氧化碳溶解於前述原液中而獲得二氧化碳水溶液；將前述二氧化碳水溶液填充於容器中，將前述容器密封，而獲得容器填裝二氧化碳水溶液；以及將前述容器填裝二氧化碳水溶液以前述二氧化碳水溶液成為60℃以上之方式進行加熱，而使前述第2增黏劑溶解於前述二氧化碳水溶液中。
