To provide a second type absorption heat pump capable of extracting uncondensed gas efficiently with a simple constitution.

A second type absorption heat pump 1 includes an evaporator 2, an absorber 3, a regenerator 4 and a condenser 5. Therein, on an absorption solution supply path 11 through which the whole amount of an absorption solution S of the absorber 35 passes from the regenerator 4, an absorber extraction tank 30 is disposed on a prestage of the absorber 3, an ejector 31 is disposed on a prestage of the absorber extraction tank 30, an extraction path 12 from the absorber 3 is connected to the ejector 31, and uncondensed gas N in the absorber 3 is extracted to the absorption solution supply path 11 via the extraction path 12 by flow of the absorption solution S passing through the ejector 31 so as to be collected into the absorber extraction tank 30.