There is provided a production method in which highly transparent fine metal hydroxide particles having a small particle size and excellent in monodispersibility can be easily produced without requiring grinding. The method for producing fine metal hydroxide particles at least includes: a reaction step of mixing an aqueous solution of a metal salt, for example, a magnesium salt, with an aqueous solution of a hydroxide salt to precipitate metal hydroxide particles in an uncrystallized state; a purification step of removing by-product salt from a mixed solution containing the precipitated metal hydroxide particles in an uncrystallized state; a surface treatment step of treating the metal hydroxide particles in an uncrystallized state obtained through the purification step with a surface-treatment agent on the surface thereof; and a heating step of crystallizing the surface-treated metal hydroxide particles in an uncrystallized state by hydrothermal treatment.