[Problem]provide a production method with which 3 5 dihydroxy 4 methoxybenzyl alcohol which is completely undetected in raw oyster meat can be produced at the stage of extracting oyster meat extract. [Solution] The present invention is characterized by producing 3 5 dihydroxy 4 methoxybenzyl alcohol from heat treated oyster meat juice by heating for six hours or longer at 98 to 100°C raw oyster meat in which 3 5 dihydroxy 4 methoxybenzyl alcohol is not detected when the oyster meat is in a raw state.