4 - (meth) acrylate hydroxybutyraldehyde

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PROBLEM TO BE SOLVED : To provide a process for producing 4-hydroxybutyl (meth)acrylate capable of efficiently producing 4-hydroxybutyl (meth)acrylate by a transesterification reaction between 1, 4-butanediol and (meth)acrylic acid alkyl ester, and efficiently recovering a transesterification catalyst to reuse it.SOLUTION : In a process for producing 4-hydroxybutyl (meth)acrylate by a transesterification reaction between 1, 4-butanediol and (meth)acrylic acid alkyl ester, the transesterification reaction between 1, 4-butanediol and (meth)acrylic acid alkyl ester is carried out in the presence of a transesterification catalyst represented by formula (I) (wherein Rand Rare each a 1-18C alkyl group, a 6-12C aryl group, or a 7-12C aralkyl group; X is an alkali metal atom or an alkaline earth metal atom; and n is the valence of X).