The present invention relates to fine particles of a poorly soluble drug to provide pharmaceutical preparation having an improved absorption by improving dissolution profile of a poorly soluble drug having a poor absorbability, as well as a method for producing the same. In particular, the present invention relates to fine particles of a poorly soluble drug, having an average particle diameter of 1 nm to 1,000 nm, wherein a particular type of an enteric base material is adsorbed on the surface of the poorly soluble drug, fine particles which further comprises a saccharide, as well as a method for producing the same. It is possible to efficiently and safely produce in a short amount of time fine particles with which absorption of a poorly soluble drug that is poorly absorbed in humans, and the like can be improved, and a pharmaceutical preparation with excellent dispersion stability can be provided, by using the fine particles of the present invention having an improved dissolution profile.
