An object of the present invention is to provide a capsule formulation comprising a phosphonooxymethyl derivative of ravuconazole which suppresses delay in dissolution due to storage regardless of an encapsulated amount of the phosphonooxymethyl derivate of ravuconazole. The present invention provides a capsule formation comprising an encapsulated material comprising {[(1R,2R)-2-[4-(4-cyanophenyl)-1,3-thiazol-2-yl]-1-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl methyl) propyl] oxy} methyl dihydrogen phosphate or a pharmacologically acceptable salt thereof, or a solvate of any of the foregoing, and a capsule shell not comprising gelatin.
