Provided is a reaction product of silicone resin polycondensate particles and polyvinyl chloride wherein the reaction product can impart excellent impact resistance and chemical resistance. The reaction product of silicone resin polycondensate particles and polyvinyl chloride according to the present invention is obtained by causing reaction of a material containing silicone resin polycondensate particles and vinyl chloride monomer. The silicone resin polycondensate particles are obtained by causing reaction of a material mixture containing a first organosilicon compound having a structural unit represented by a formula (1) and serving as a siloxane, a second organosilicon compound represented by a formula (2), and a third organosilicon compound represented by a formula (3A) or formula (3B).