It is intended to provide a carbonated beverage excelling in function as thirst-quenching beverage and taste through strengthening or sustaining of carbonated feel peculiar to carbonated beverage (brisk intense stimulation and sensation at pass through the throat, brought about by carbon dioxide gas, and sensation of coolness (refreshing sensation) produced by a combination of carbon dioxide gas and flavor) which after opening, rapidly drops depending upon a combination of employed raw materials, such as fruit juice, sweetener, color additives and flavoring, and upon evaporation of carbon dioxide gas. The drop of carbonated feel brought about depending upon a combination of raw materials, such as fruit juice and sweetener, can be relieved by adding to a carbonated beverage an additive for carbonated beverage comprising spilanthol or a spilanthol-containing plant extract or plant essential oil as an active ingredient. Further, the addition would help inhibit drop of carbonated feel brought about depending upon evaporation of carbon dioxide gas after opening and would help retain the taste and function as function as thirst-quenching beverage inherently to be had by carbonated beverage even after opening.本發明之目的係提供一種藉由增強或維持所使用的果汁、甘味料、色素及香料等之原料的組合，或因碳酸氣體之散逸、而於開罐後急速降低的碳酸飲料特有的碳酸感(藉由碳酸氣體使喉嚨通過舒爽且強烈的刺激感及伴隨碳酸氣體與口味產生的清涼感(瞬間感))，作為止渴飲料之優異功能或嗜好性的碳酸飲料。藉由在碳酸飲料中添加以千日菊醇或含有千日菊醇之植物萃取物或植物精油作為有效成分之碳酸飲料用添加劑，即使組合果汁、甘味料等原料時仍可改善碳酸感降低的情形。另外，可抑制因開罐後碳酸氣體之散逸而降低碳酸感的情形，於開罐後仍可維持碳酸飲料原本企求的作為止渴飲料之功能或嗜好性。
