Absorption refrigerator

The invention provides an absorption refrigerator which can be stably operated even if the cooling water is low in temperature, and comprises a high temperature regenerator (5), a low temperature regenerator (6), an evaporator (1), a condenser (7) and an absorber (2). The high temperature regenerator (5) is connected to the condenser (7) through a refrigerant pipe (31) of the low temperature regenerator (6). The refrigerant pipe (31) is provided with a flow path resistance mechanism (41) applying a flow path resistance and a bypass pipe (42) bypassing the flow path resistance mechanism (41). The bypass pipe (42) is provided with an open and close valve (43) where cooling water circulates in the cooling water pipes (15) of the absorber (2) and the condenser (7). A cooling water temperaturesensor (62) for measuring the temperature of cooling water and a valve control mechanism (50) which controls the valve based on the measuring result of the cooling water temperature sensor are disposed at the absorber inlet s