it is an object of the present invention to provide a vinyl ether group - containing acrylic ester , which has both radical polymerizability and cation polymerizability , improved in storage stability and stability in handling without impairing its polymerizability or , in other words , provide a stabilized vinyl ether group - containing acrylic ester . another object is to provide a method of producing a stabilized vinyl ether group - containing acrylic ester composition . a further object is to provide a method of stably handing , a method of economically and stably producing and a method of purifying a vinyl ether group - containing acrylic ester . a vinyl ether group - containing acrylic ester composition which comprises a radical polymerization inhibitor and a vinyl ether group - containing acrylic ester represented by the following general formula : ch2 = cr1 - coo — r2 - o — ch ═ ch — r3 in the formula , r1 represents a hydrogen atom or a methyl group , r2 represents an organic residue and r3 represents a hydrogen atom or an organic residue .