There is provided a method of producing composite particles each comprising a polymer compound and solid particles, the method including: (1) mixing a first liquid containing a monomer and an organicsolvent with solid particles to prepare a mixed solution; (2) preparing a second liquid; (3) mixing the mixed solution with the second liquid to form an emulsion; (4) fractionating the first liquid from a dispersoid of the emulsion; and (5) polymerizing the monomer remaining in the dispersoid after the fractionation. Composite particles each comprising solid particles uniformly at a high ratio andhaving excellent size uniformity and dispersibility can be obtained thereby.