To provide a new magnetic fine particle-containing dosage form, a method for producing the same and a magnetic fine particle-containing preparation.

This magnetic fine particle-containing dosage form 10 includes a molecular aggregate 1, a coating magnetic fine particle-containing membrane 2 for covering the molecular aggregate 1 and containing the magnetic fine particles 3. A pharmaceutical agent can be incorporated in at least any of the molecular aggregate 1 and the covering magnetic fine particle-containing membrane 2. The magnetic fine particle-containing preparation 100 includes the fine magnetic particle-containing dosage form 10 and a compound organizer 40 for forming an associated body with the same. In the compound organizer 40, a pharmaceutical agent can be incorporated. Suitable examples of the molecular aggregate 1 can include micelle and liposome.