PURPOSE: To prepare an acidic seasoning completely free from bitter taste caused by the addition of a calcium salt, and preservable for a long period without causing the degradation and the collapse of the shape.

CONSTITUTION: An aqueous solution of a calcium salt containing 20W50wt% of a saccharide such as sucrose, glucose, fructose, etc. is added dropwise to an aqueous solution of sodium alginate. Small capsules consisting of a skin made of calcium alginate and a core composed of an aqueous solution of calcium chloride and the saccharide in fluid form are produced successively by the process. The capsules are collected, exposed to fresh water to substitute the content of the cavity with fresh water, and immersed in an acidic seasoning liquid containing 0.01W0.10wt%, preferably 0.03W0.08wt% of a calcium salt to substitute the content of the cavity with the acidic seasoning liquid.