To provide a connecting structure, capable of easily connecting and removing a plurality of heat exchangers with each other.

In the connecting structure of a plurality of the heat exchangers wherein at least one exchanger of the plurality of heat exchangers 5, 6 having a core consisting of a multitude of tubes 1 and fins 2 and tanks 3, 4 arranged at the end part of the core is constituted of a structure in which a groove type reinforcing member 7 is arranged at the end part of the core and whose opening side is arranged so as to be faced to outside while the heat exchangers 5, 6 are connected to each other by a connecting part, the slits 9 of a formed block body 8 made of a synthetic resin are fitted to the reinforcing member 7 of the heat exchanger 5 to connect the heat exchangers through screwing a nut 12 and a bolt 13.