A hydrosilylation-curable silicone resin composition having a melting point of not less than 5O0C and a melt-viscosity of not less than 5,000 mPa-s at 15O0C, which is characterized by having a phosphorous-containing hydrosilylation-reaction retardant; is solid at room temperature, melts with heating, suitable for transfer and injection molding, and, when cured, capable of forming a cured body of high strength and minimal color change under the effect of ultraviolet rays and heat.