A refrigerator comprising: a main body that includes an inner case including a storage chamber; a refrigerating chamber discharge duct that divides the storage chamber into a heat exchange chamber and a refrigerating chamber and includes refrigerating chamber discharge holes for allowing cold air to pass between the heat exchange chamber and the refrigerating chamber; a refrigerating chamber thermoelectric module including a first heat absorbing unit and a first heat dissipating unit configured to dissipate heat absorbed from the refrigerating chamber to an outside of the refrigerator, the first heat absorbing unit disposed in the heat exchange chamber for cooling the cold air; a refrigerating chamber cooling fan to circulate the cold air in the refrigerating chamber to the heat exchange chamber and the refrigerating chamber; a freezing compartment disposed in the refrigerating chamber and including a freezing chamber; a refrigerating chamber heat dissipating fan for blowing external air to the first heat dissipating unit; a freezing compartment thermoelectric module including a second heat absorbing unit disposed in the freezing compartment and a second heat dissipating unit disposed between the freezing compartment and the inner case; a freezing chamber heat dissipating fan that blows the cold air from the heat exchange chamber to the second heat dissipating unit; and an air guide that forms a channel for guiding the cold air from the heat exchange chamber to the second heat dissipating unit, the air guide is disposed over the refrigerating chamber discharge duct, wherein the air guide includes an expanding portion disposed between an upper end of the refrigerating chamber discharge duct and the second heat dissipating unit. a main body that includes an inner case including a storage chamber; a refrigerating chamber discharge duct that divides the storage chamber into a heat exchange chamber and a refrigerating chamber and includes refrigerating chamber discharge holes for allowing cold air to pass between the heat exchange chamber and the refrigerating chamber; a refrigerating chamber thermoelectric module including a first heat absorbing unit and a first heat dissipating unit configured to dissipate heat absorbed from the refrigerating chamber to an outside of the refrigerator, the first heat absorbing unit disposed in the heat exchange chamber for cooling the cold air; a refrigerating chamber cooling fan to circulate the cold air in the refrigerating chamber to the heat exchange chamber and the refrigerating chamber; a freezing compartment disposed in the refrigerating chamber and including a freezing chamber; a refrigerating chamber heat dissipating fan for blowing external air to the first heat dissipating unit; a freezing compartment thermoelectric module including a second heat absorbing unit disposed in the freezing compartment and a second heat dissipating unit disposed between the freezing compartment and the inner case; a freezing chamber heat dissipating fan that blows the cold air from the heat exchange chamber to the second heat dissipating unit; and an air guide that forms a channel for guiding the cold air from the heat exchange chamber to the second heat dissipating unit, the air guide is disposed over the refrigerating chamber discharge duct, wherein the air guide includes an expanding portion disposed between an upper end of the refrigerating chamber discharge duct and the second heat dissipating unit.