PURPOSE: A fruit juice and a preparation method thereof are provided to exhibit high dispersion stability. CONSTITUTION: A fruit juice is composed of: 0.002-1.0wt% one or more thickening stabilizers selected from the group consisting of low acyl gellan gum, high acyl gellan gum, xanthan gum, arabic gum, locust bean gum, carboxymethyl cellulose, and carrageenan 1-50wt% fruit liquid 0.01-20wt% sweetener 0.01-0.5wt% acidifier 0.01-0.5wt% other additives 0.001-1.0wt% water-soluble calcium salt and the remainder of water.