The present invention relates to an aqueous composition for a hard capsule, a preparation method thereof, and a hard capsule prepared by using the aqueous composition. More particularly, the present invention relates to an aqueous composition for a hard capsule, which is excellent in formability of the capsule while securing safety by including a small amount of alcohol, and a hard capsule prepared by using the same.本發明關於一種用於硬膠囊之水性組合物、其製備方法以及使用該水性組合物製得之硬膠囊。本發明特別關於一種具有優異的膠囊成形性,且因包含少量的酒精而確保安全性之用於硬膠囊之水性組合物,以及使用其製備之硬膠囊。