A method of producing a curable hot melt composition comprising: (I) a hot melt silicone; (II) an organopolysiloxane which has at least two silicon atom-bonded hydrogen atoms in a molecule and in which an amount of silicon atom-bonded hydrogen atom is 0.5 mass% or greater, in an amount such that an amount of the silicon atom-bonded hydrogen atom in component (II) is from 0.5 to 2.0 mol per 1 mol of alkenyl group in component (I); and (III) a hydrosilylation reaction catalyst, wherein component (I) is non-flowable at 25°C and that has a melt viscosity at 100°C of 5,000 Pa·s or less, and is formed by subjecting (A) an alkenyl group-containing organopolysiloxane in which 10 mol% or greater of all of silicon atom-bonded organic groups is a phenyl group, and (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule, in an amount such that an amount of the silicon atom-bonded hydrogen atoms in component (B) is from 0.2 to 0.7 mol per 1 mol of alkenyl group in component (A), to a hydrosilylation reaction in the presence of (C) a hydrosilylation reaction catalyst, in an amount that is sufficient to promote the hydrosilylation reaction of components (A) and (B), wherein "non-flowable" means not flowing when no load is applied, and indicates the condition at lower than the softening point measured by a testing method for the softening point by the Ring-and-ball method of a hot melt adhesive agent stipulated in JIS K 6863-1994, "Testing methods for the softening point of hot melt adhesives", and wherein the melt viscosity at 100°C is measured using a cone plate viscometer which was capable of adjusting the temperature. (I) a hot melt silicone; (II) an organopolysiloxane which has at least two silicon atom-bonded hydrogen atoms in a molecule and in which an amount of silicon atom-bonded hydrogen atom is 0.5 mass% or greater, in an amount such that an amount of the silicon atom-bonded hydrogen atom in component (II) is from 0.5 to 2.0 mol per 1 mol of alkenyl group in component (I); and (III) a hydrosilylation reaction catalyst, wherein component (I) is non-flowable at 25°C and that has a melt viscosity at 100°C of 5,000 Pa·s or less, and is formed by subjecting (A) an alkenyl group-containing organopolysiloxane in which 10 mol% or greater of all of silicon atom-bonded organic groups is a phenyl group, and (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms in a molecule, in an amount such that an amount of the silicon atom-bonded hydrogen atoms in component (B) is from 0.2 to 0.7 mol per 1 mol of alkenyl group in component (A), to a hydrosilylation reaction in the presence of (C) a hydrosilylation reaction catalyst, in an amount that is sufficient to promote the hydrosilylation reaction of components (A) and (B), wherein "non-flowable" means not flowing when no load is applied, and indicates the condition at lower than the softening point measured by a testing method for the softening point by the Ring-and-ball method of a hot melt adhesive agent stipulated in JIS K 6863-1994, "Testing methods for the softening point of hot melt adhesives", and wherein the melt viscosity at 100°C is measured using a cone plate viscometer which was capable of adjusting the temperature. <EOS>