This invention aims to provide a novel (meta) acrylate ester compound that has reduced toxicity such as odor and skin irritability, excellent viscosity reduction effect, and superior polymerization reactivity as a reactive diluent, as well as a polymerizable composition containing the (meta) acrylate ester compound. The (meta) acrylate ester compound according to the present invention is characterized by being represented by the following formula (I). [In the formula, R1 represents a hydrogen atom or a methyl group, R2 and R3 independently represent a hydrogen atom or a C1-4 alkyl group, and n represents 1 or 2].