A method for modifying a liquid dispersion of fine particles, for improving dispersibility of fine particles, characterized in that: the liquid dispersion is a liquid dispersion of fine particles that contains fine particles, which are particles having a primary particle diameter of 1 μm or less, wherein the liquid dispersion includes agglomerates of the fine particles and impurities, which include intra-liquid impurities which are present within the liquid dispersion independently of the agglomerates and cause the agglomeration of the fine particles, and intra-particle impurities which are present within the agglomerates, a dispersion treatment is performed by applying physical energy to agglomerates of the fine particles contained in the liquid dispersion of fine particles to cause said agglomerates to disperse into particles which are smaller than the agglomerates of the fine particles, whereby intra-particle impurities are released out of the agglomerates into the liquid dispersion to be the intra-liquid impurities, the liquid dispersion is transported after the dispersion treatment to a removing unit, and a removal treatment in which the intra-liquid impurities are removed from the liquid dispersion by means of a removing unit is performed before the complete re-agglomeration of the fine particles that have been subjected to the dispersion treatment is brought about by the intra-liquid impurities, wherein the removal treatment to remove the intra-liquid impurities from the liquid dispersion is started within 3 seconds of the intra-particle impurities being released out of the agglomerates into the liquid dispersion to be the intra-liquid impurities. the liquid dispersion is a liquid dispersion of fine particles that contains fine particles, which are particles having a primary particle diameter of 1 μm or less, wherein the liquid dispersion includes agglomerates of the fine particles and impurities, which include intra-liquid impurities which are present within the liquid dispersion independently of the agglomerates and cause the agglomeration of the fine particles, and intra-particle impurities which are present within the agglomerates, a dispersion treatment is performed by applying physical energy to agglomerates of the fine particles contained in the liquid dispersion of fine particles to cause said agglomerates to disperse into particles which are smaller than the agglomerates of the fine particles, whereby intra-particle impurities are released out of the agglomerates into the liquid dispersion to be the intra-liquid impurities, the liquid dispersion is transported after the dispersion treatment to a removing unit, and a removal treatment in which the intra-liquid impurities are removed from the liquid dispersion by means of a removing unit is performed before the complete re-agglomeration of the fine particles that have been subjected to the dispersion treatment is brought about by the intra-liquid impurities, wherein the removal treatment to remove the intra-liquid impurities from the liquid dispersion is started within 3 seconds of the intra-particle impurities being released out of the agglomerates into the liquid dispersion to be the intra-liquid impurities.