Abstract: A radiator core support structure includes a radiator core support, a first heat exchanger and a second heat exchanger. The radiator core support has a lower radiator core support member. The first heat exchanger is arranged to face a front surface of the lower radiator core support member to cover a front surface thereof. The second heat exchanger is aligned with the first heat exchanger at a rear side thereof. The lower radiator core support member is formed with an airflow space that is formed inside of the lower radiator core support member to extend in a lateral direction of a vehicle. The airflow space is fluidically connected with an intake opening portion that is formed on the front surface of the lower radiator core support member at a position where the first heat exchanger faces the lower radiator core support member to cover, and also with an exhaust opening portion that is formed at on a partial portion of the lower radiator core support member.