n this study, we investigated the effect of bananas on improving of sluggish blueberry wine fermentation. The alcoholic fermentation was carried out with yeast extract, diammonium phosphate, or 2%, 4%, and 6% banana. The number of viable yeast cells gradually decreased during fermentation and the population stabilized at approximately 104 cfu/ml by the end of fermentation. The average ethanol production rate was 1.32–1.68 times faster according to the addition of banana during 20 days of fermentation. The sugar consumption rate (°Brix/day) was increased 1.30, 1.49 and 1.63-fold by 2%, 4% and 6% of banana addition, respectively. The wines supplemented with 4% and 6% banana contained 61.7 μg/l and 60.8 μg/l of ethyl carbamate, respectively, which was higher than that with 2% banana (54.5 μg/l). Thus, we concluded that 2% banana can be used as a nutritional supplement for yeast to resolve stuck and sluggish blueberry wine fermentation.