To provide an electron beam-curable polymn. comps, which has improved transparency, heat, water and moisture resistances, antistatic property, and adhesion by incorporating a compd., contg. an ethylenic double bond, and a specified polythiol.

A compd. having two or more ethylenic double bond and a polythiol represented by the formula R-(SH)n (wherein R represents a polyvalent org. group; and n is 2 to 4) are mixed together in an aq. ratio of (3:1) to (1:3) to obtain an electron beam-curable polymn. compsn. This compsn. is applied onto one side of a 50 to 400μm-thick plastic film to a thickness of 1 to 1,000μm, followed by irradiation with an electron beam to conduct curing, thereby obtaining an electron beam-cured resin.