The present invention provides: an unsaturated carboxylate which has both an unsaturated group and a hydroxyl group, and is applicable to a wide range of crosslinking processes, and has moderate polymerizability, and has a novel specific structure; and a production process which enables to obtain this unsaturated carboxylate without causing the rearrangement of the carbon-carbon unsaturated bond of the raw unsaturated oxirane, and gives a high production ratio of unsaturated oxirane-1-mol adduct. A reaction of a specific unsaturated carboxylic acid with a specific unsaturated oxirane is carried out using at least one catalyst selected from the group consisting of chromium compounds, manganese compounds, iron compounds, nickel compounds, zinc compounds, silver compounds, tin compounds, neodymium compounds, and lead compounds, thereby obtaining an unsaturated carboxylate of general formula (1).