To provide an agent for preventing the adhesion of a tacky substance effective for preventing contamination of a mold surface with an adhering tacky substance generated by the exposure of plastics and rubbers to high temperature in the case of repeating the molding work of the plastics and rubbers and preventing the clinging of a tacky substance in a polluted gas or exhausted gas to the surface of plastic, glass, wood, stone, etc., and provide a mold-releasing agent to enable easy release of a molded article from a mold in the case of repeating the molding work of plastics or rubbers and keeping the releasing effect for a long period.

The agent for preventing the adhesion of a tacky substance and the mold-releasing agent contain a specific organic boron polymer compound A and optionally a polar solvent.