Disclosed is a green tea extract obtained through: step (1) for fractionating green tea leaves by vacuum steam distillation and removing a liquid distillate thus obtained； step (2) for fractionating the green tea leaves, from which the liquid distillate has been removed in step (1), by atmospheric-pressure steam distillation to obtain a liquid distillate； step (3) for extracting the green tea leave residue, which remains after the steam distillation in step (2), with water to give a liquid extract； step (4) for mixing the liquid distillate of step (2) with the liquid extract of step (3) to give a green tea extract； and step (5) for thermally treating the green tea extract of step (4) at a temperature equal to or lower than 100
