The present invention relates to a composition comprising (A) an active ingredient that is hardly-soluble in water and soluble in a lower C1-4alcohol optionally-containing 30 v/v % or less water, (B) a polyvinyl alcohol whose saponification rate is 55 % to 99 %, and (C) a non-ionic surfactant, wherein the mean particle size of the active ingredient (A) is 10 nm to 300 nm, and a process thereof.本發明係關於一種組合物及其製造方法,該組合物係含有(A)難溶於水且溶解於可含有30 vol%以下之水之碳數1~4之低級醇的活性成分、(B)皂化率為55~99%之聚乙烯醇、及(C)非離子界面活性劑者,且(A)之活性成分之平均粒徑為10~300 nm。無