The purpose of this study was to search for a mixture of stevioside and sucrose, the sweetness of which in soft drink such as cocoa and ginger tea were almost equal the sweetness of commomly used 7% sucrose in the drinks. Results obtained by the present experiment were as fellows: 1) Mixture of 50% stevioside 40mg (0.04%) (A) and 2.0% sucrose, 95% stevioside 40mg (0.04%) (B) and 1.0% sucrose, and 50% and 95% stevioside 60mg (0.06%) (A,B) respectively, the sweetness of which in ginger tea corresponded to that of reference in the drink. 2) Mixture of 50% stevioside 40mg (0.04%) (A) and 2.0% sucrose, 95% stevioside 20mg (0.02%) (B) and 2.0% sucrose, and 50% stevioside 40-60mg (0.04-0.06%) (A) and 95% stevioside 40-60mg (0.04-0.05%) (B), the sweetness of which in cocoa is equal to that of standard sucrose in the drink. 3) The mixture contains low energe, and also the after-taste of stevioside was not detected in the above drinks.