An absorption refrigerator, comprising: an evaporator which absorbs heat from the outside and causes a refrigerant to evaporate, thereby generating a refrigerant vapor; an absorber which causes the refrigerant vapor to be absorbed by an absorbent solution; a generator which heats the absorbent solution including the refrigerant vapor absorbed therein to release the refrigerant vapor from the absorbent solution; a condenser which condenses the thus released refrigerant vapor into the refrigerant and gives off heat to the outside; and a gas extraction tube (35; 82) disposed vertically for extracting non-condensable gas from the absorption refrigerator, characterized in that the gas extraction tube (35; 82) is disposed in at least one of the absorber and the condenser, wherein the gas extraction tube (35; 82) includes a pressure balancing section (36; 83) extending above a neighborhood (H1; H2) on an upper side of a maximum liquid level (17 MAX; 20 MAX) of the absorber or the condenser, and a gas extracting section (37; 84) continuous with pressure balancing section (36; 83) and extending below the neighborhood (H1; H2) on the upper side of the maximum liquid level (17 MAX; 20 MAX) of the absorber or the condenser, and wherein the gas extraction tube (35; 82) has a plurality of suction holes (38, 39; 86, 87) formed therein and distributed over the pressure balancing section (36; 83) and the gas extracting section (37; 87), said pressure balancing section including a plurality of pressure balancing section suction holes (38; 86), said gas extracting section including a plurality of gas extracting section suction holes (39; 87). an evaporator which absorbs heat from the outside and causes a refrigerant to evaporate, thereby generating a refrigerant vapor; an absorber which causes the refrigerant vapor to be absorbed by an absorbent solution; a generator which heats the absorbent solution including the refrigerant vapor absorbed therein to release the refrigerant vapor from the absorbent solution; a condenser which condenses the thus released refrigerant vapor into the refrigerant and gives off heat to the outside; and a gas extraction tube (35; 82) disposed vertically for extracting non-condensable gas from the absorption refrigerator, characterized in that the gas extraction tube (35; 82) is disposed in at least one of the absorber and the condenser, wherein the gas extraction tube (35; 82) includes a pressure balancing section (36; 83) extending above a neighborhood (H1; H2) on an upper side of a maximum liquid level (17 MAX; 20 MAX) of the absorber or the condenser, and a gas extracting section (37; 84) continuous with pressure balancing section (36; 83) and extending below the neighborhood (H1; H2) on the upper side of the maximum liquid level (17 MAX; 20 MAX) of the absorber or the condenser, and wherein the gas extraction tube (35; 82) has a plurality of suction holes (38, 39; 86, 87) formed therein and distributed over the pressure balancing section (36; 83) and the gas extracting section (37; 87), said pressure balancing section including a plurality of pressure balancing section suction holes (38; 86), said gas extracting section including a plurality of gas extracting section suction holes (39; 87).