A refrigerator comprising: a refrigerator main body having a refrigerating chamber, a freezing chamber and a machine room to accommodate at least part of a refrigerant compression cycle apparatus; a condenser disposed within the machine room; a lower frame installed at the bottom of the refrigerator main body; at least one compressor (210, 212) disposed within the machine room; and a fan arranged to introduce external air into the machine room and then discharge out of the machine room; an insulation foam located between the refrigerating chamber or the freezing chamber and the lower frame, wherein the insulation foam is formed of foamed urethane; a condenser cover installed at the lower frame where the condenser is located and provided with a plurality of inlet ports for introduction of external air therethrough; and the fan is arranged to form an air passage through which external air passed through the condenser is supplied to the at least one compressor (210, 212) and discharged out of the machine room; the machine room is provided with a first region located between the refrigerating chamber and the lower frame, and a second region located below the refrigerating chamber and freezing chamber (110, 120) and connected with the first region, wherein the condenser is disposed in the first region and the at least one compressor (210, 212) is disposed in the second region, the insulation foam is provided with an insertion groove in which the condenser is inserted, the condenser cover is installed at an opening formed at the lower frame to cover an outside of the condenser, so that when the external air is introduced into the condenser cover through the inlet ports of the condenser cover, it cools the condenser in the first region, and then flows into the second region to cool the at least one compressor (210, 212). a refrigerator main body having a refrigerating chamber, a freezing chamber and a machine room to accommodate at least part of a refrigerant compression cycle apparatus; a condenser disposed within the machine room; a lower frame installed at the bottom of the refrigerator main body; at least one compressor (210, 212) disposed within the machine room; and a fan arranged to introduce external air into the machine room and then discharge out of the machine room; an insulation foam located between the refrigerating chamber or the freezing chamber and the lower frame, wherein the insulation foam is formed of foamed urethane; a condenser cover installed at the lower frame where the condenser is located and provided with a plurality of inlet ports for introduction of external air therethrough; and the fan is arranged to form an air passage through which external air passed through the condenser is supplied to the at least one compressor (210, 212) and discharged out of the machine room; the machine room is provided with a first region located between the refrigerating chamber and the lower frame, and a second region located below the refrigerating chamber and freezing chamber (110, 120) and connected with the first region, wherein the condenser is disposed in the first region and the at least one compressor (210, 212) is disposed in the second region, the insulation foam is provided with an insertion groove in which the condenser is inserted, the condenser cover is installed at an opening formed at the lower frame to cover an outside of the condenser, so that when the external air is introduced into the condenser cover through the inlet ports of the condenser cover, it cools the condenser in the first region, and then flows into the second region to cool the at least one compressor (210, 212).