In one embodiment of the present invention, provided are a method for producing indium tin oxide particles, including a step of obtaining a precursor solution including indium and tin by heating an indium carboxylate having 1 to 3 carbon atoms and a tin carboxylate having 1 to 3 carbon atoms in a solvent including a carboxylic acid having 6 to 20 carbon atoms, and a step of obtaining a reaction solution including indium tin oxide particles by adding dropwise the obtained precursor solution to a heated solvent including oleyl alcohol and linear alcohol having 14 to 18 carbon atoms, in which, in the solvent, a concentration A of the linear alcohol having 14 to 18 carbon atoms with respect to all solvents, in units of % by mass, and a concentration B of the oleyl alcohol with respect to all solvents, in units of % by mass, satisfy the expression 1; and a method for producing a curable composition. A/(A+B)>0.062:  Expression 1