By assuming the use of gelatin as a main base material of a capsule coating, provided is a capsule having excellent enteric properties. The enteric capsule contains alkali-treated gelatin and carrageenan as base materials of a capsule coating. In the gastric (aqueous) environment, the alkali-treated gelatin that is positively (+) charged coexists with the carrageenan that is negatively (-) charged and amino (NH4+) group in the gelatin reacts with sulfate (SO3-) group in the carrageenan so that the capsule coating is insolubilized. Meanwhile, in the enteric (aqueous) environment, the alkali-treated gelatin that is negatively (-) charged coexists with the carrageenan that is also negatively (-) charged and amino (NH4+) group in the gelatin repulses with sulfate (SO3-) group in the carrageenan so that the capsule coating quickly disintegrates and dissolves.
