A vehicle heat exchange structure (10; 100) comprising: a heat exchanger that heats air by heat exchange between the air and a heating medium circulating between a power unit which is cooled by a radiator (25R; 102R) and the heat exchanger; an air conditioning device that introduces the air that has been heated by the heat exchanger into a vehicle compartment as air conditioning air; a radiator (25R; 102R) that cools liquid coolant by heat exchange with air, the liquid coolant circulating between the power unit and the radiator (25R; 102R); and a fan that generates an airflow (Fr) that passes the radiator (25R; 102R) and is expelled to outside the vehicle; an exhaust device (78, 20, 34, 62, 26) that comprises a communication portion that communicates a downstream side of an airflow (Fa) with respect to the heat exchanger with a downstream side of an airflow (Fr) with respect to the radiator (25R; 102R), and that expels the air that has been heated by the heat exchanger to outside the vehicle; and a switching device (80, 82, 84) that switches within a plurality of modes including a first mode in which the air conditioning device functions, and a second mode in which the exhaust device (78, 20, 34, 62, 26) functions and that comprises an opening and closing mechanism that closes off the communication portion in the first mode, and opens up the communication portion in the second mode, characterized in that the path through which liquid coolant circulates between the power unit and the radiator (25R; 102R) and the path through which heating medium circulates between the power unit and the heat exchanger are provided as independent circulating paths. a heat exchanger that heats air by heat exchange between the air and a heating medium circulating between a power unit which is cooled by a radiator (25R; 102R) and the heat exchanger; an air conditioning device that introduces the air that has been heated by the heat exchanger into a vehicle compartment as air conditioning air; a radiator (25R; 102R) that cools liquid coolant by heat exchange with air, the liquid coolant circulating between the power unit and the radiator (25R; 102R); and a fan that generates an airflow (Fr) that passes the radiator (25R; 102R) and is expelled to outside the vehicle; an exhaust device (78, 20, 34, 62, 26) that comprises a communication portion that communicates a downstream side of an airflow (Fa) with respect to the heat exchanger with a downstream side of an airflow (Fr) with respect to the radiator (25R; 102R), and that expels the air that has been heated by the heat exchanger to outside the vehicle; and a switching device (80, 82, 84) that switches within a plurality of modes including a first mode in which the air conditioning device functions, and a second mode in which the exhaust device (78, 20, 34, 62, 26) functions and that comprises an opening and closing mechanism that closes off the communication portion in the first mode, and opens up the communication portion in the second mode, characterized in that the path through which liquid coolant circulates between the power unit and the radiator (25R; 102R) and the path through which heating medium circulates between the power unit and the heat exchanger are provided as independent circulating paths.