An orally-administered agent according to the present invention comprises: a medicine-containing layer containing a medicine and having surfaces； collapse-controlling layers respectively provided on the surfaces of the medicine-containing layer； and gel-forming layers respectively provided on the collapse-controlling layers, wherein the gel-forming layers are swelled and gelatinized by absorbing water to form a gel. The collapse-controlling layers are constituted of a material containing a stomach-soluble material to be dissolved by being in contact with gastric juice. The orally-administered agent according to the present invention can be swallowed with ease and release the medicine in intended parts, in particular, the stomach of a living body.
