A refrigerator comprising: a first compressor that is disposed at a low pressure side; a second compressor that is installed downstream of the first compressor at a high pressure side; a condenser (102, 202) that is configured to condense the refrigerant compressed by the first and second compressors (201a, 201b); a first and a second expander (103a, 104a, 203a, 204a) that are respectively configured to depressurize the refrigerant condensed by the condenser; a first evaporator (110, 210), provided at one side of a refrigerator compartment, being configured to evaporate the refrigerant depressurized by the first expander (103a, 203a); a second evaporator (150, 250), provided at one side of a freezer compartment, being configured to evaporate the refrigerant depressurized by the second expander (104a, 204a); a valve unit (120, 220), provided downstream of the condenser (102, 202), being configured to guide the condensed refrigerant towards at least one of the first and second evaporators a first refrigerant path (103, 203) in which the first evaporator (110, 210) is included; and a second refrigerant path (104, 204) in which the second evaporator (150, 250) is included, wherein the first and second refrigerant paths (103, 203, 104, 204) branch from the valve unit (120, 220); and a hot gas path (105, 205) connecting the valve unit (120, 220) to the second evaporator (150, 250), wherein the second evaporator (150, 250) comprises: a first passage in which the refrigerant depressurized by the second expander flows; a second passage forming at least a part of the hot gas path (105, 205) and in which the refrigerant flowing through the hot gas path (105, 205) flows; and a fin in which the first and the second passage pass through, and wherein the hot gas path (105, 205) is connected to a combination part (103b, 203b) of the first refrigerant path (103, 203), such that the refrigerant passed through the second evaporator (150, 250) is introduced to the first refrigerant path (103, 203) through the combination part (103b, 203b), depressurized by the first expander (103a, 203a), and flows to the first evaporator (110, 210), whereby the refrigerant passing through the second evaporator is, after single-stage compressed by the first compressor, mixed with the refrigerant passing through the first evaporator, to be introduced into the second compressor. a first compressor that is disposed at a low pressure side; a second compressor that is installed downstream of the first compressor at a high pressure side; a condenser (102, 202) that is configured to condense the refrigerant compressed by the first and second compressors (201a, 201b); a first and a second expander (103a, 104a, 203a, 204a) that are respectively configured to depressurize the refrigerant condensed by the condenser; a first evaporator (110, 210), provided at one side of a refrigerator compartment, being configured to evaporate the refrigerant depressurized by the first expander (103a, 203a); a second evaporator (150, 250), provided at one side of a freezer compartment, being configured to evaporate the refrigerant depressurized by the second expander (104a, 204a); a valve unit (120, 220), provided downstream of the condenser (102, 202), being configured to guide the condensed refrigerant towards at least one of the first and second evaporators a first refrigerant path (103, 203) in which the first evaporator (110, 210) is included; and a second refrigerant path (104, 204) in which the second evaporator (150, 250) is included, wherein the first and second refrigerant paths (103, 203, 104, 204) branch from the valve unit (120, 220); and a hot gas path (105, 205) connecting the valve unit (120, 220) to the second evaporator (150, 250), wherein the second evaporator (150, 250) comprises: a first passage in which the refrigerant depressurized by the second expander flows; a second passage forming at least a part of the hot gas path (105, 205) and in which the refrigerant flowing through the hot gas path (105, 205) flows; and a fin in which the first and the second passage pass through, and a first passage in which the refrigerant depressurized by the second expander flows; a second passage forming at least a part of the hot gas path (105, 205) and in which the refrigerant flowing through the hot gas path (105, 205) flows; and a fin in which the first and the second passage pass through, and wherein the hot gas path (105, 205) is connected to a combination part (103b, 203b) of the first refrigerant path (103, 203), such that the refrigerant passed through the second evaporator (150, 250) is introduced to the first refrigerant path (103, 203) through the combination part (103b, 203b), depressurized by the first expander (103a, 203a), and flows to the first evaporator (110, 210), whereby the refrigerant passing through the second evaporator is, after single-stage compressed by the first compressor, mixed with the refrigerant passing through the first evaporator, to be introduced into the second compressor.