PURPOSE: An air preheating device for an absorptive water cooler/heater is provided to supply hot air to an air preheater by connecting a heat pipe to the burner of a high temperature generator. CONSTITUTION: An air preheating device for an absorptive water cooler/heater comprises a high temperature generator(10) with a burner(11). Multiple heat pipes(100) are connected with an air pre-heater(16) to immediately transfer the hot air generated from the burner of the high temperature generator. A blower(15) for supplying combustion air and a fuel tank(13) are installed on one side of the air pre-heater. The combustion air supplied from the blower is heated by the hot air generated from the burner of the high temperature generator. Heat radiation fins(111) are formed on one end(110) of the heat pipe passing through the air pre-heater. The contact of the heat pipe and air increases by the heat radiation fins.
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