The present invention provides a solid preparation comprising, based on 100 parts by weight of the solid preparation, a self-emulsifying composition comprising 0.1 to 0.5 parts by weight of dutasteride, 6 to 110 parts by weight of oil and 6 to 110 parts by weight of a surfactant, and 5 to 185 parts by weight of a coating excipient having pores accommodating the self-emulsifying composition formed in a surface thereof, and a method of manufacturing the solid preparation.