PROBLEM TO BE SOLVED: To provide a new hard candy mainly made of acidic ingredients and having both completely new taste and deliciousness and a method for producing the same.SOLUTION: The hard candy includes a citric acid crystal structure made of a citric acid monohydrate and/or citric acid anhydride, and a hard candy base. The ratio of the exposed surface area of the citric acid crystal structure to that of the hard candy base is in the range from 1:10 to 1:100, and the ratio of weight of the citric acid crystal structure to that of the hard candy base is in the ratio from 1:10 to 1:50.