A heat exchanger mounting structure is provided with a bracket, a load supporting section, a fitting member, and a contact section. The bracket is provided to one of a first heat exchanger and a second heat exchanger. The load supporting section is provided to the other heat exchanger to which the bracket is not provided, and supports a load transmitted from the one of the first heat exchanger and the second heat exchanger. The fitting member is provided to the one of the first heat exchanger and the second heat exchanger, to which the bracket is provided, and is fitted over the load supporting section. The contact section is in contact with at least a part of the upper portion of the bracket.