Provided is a capsule formulation capable of retaining a hydrophilic substance over a long period of time and also capable of containing incompatible components, in a single capsule. A capsule formulation is produced by encapsulating with a hydrophilic film, a capsule content formed by enclosing an aqueous solution in an oily substance containing a porous microparticulate powder. The capsule formulation preferably comprises 0.1 to 20 parts by weight of the porous microparticulate powder based on 100 parts by weight of the oily substance, and it is preferably a soft capsule formulation.
