A refrigerator has a refrigerator compartment (102), a freezer compartment (103), and a low-temperature storage chamber (133) formed in the refrigerator compartment (102) and having a temperature lower than that of the refrigerator compartment (102). The refrigerator includes a compressor (111), a condenser (112), a first throttling device (113), a channel control valve (122), a refrigerator cooling unit (110), and a freezer cooling unit (108) connected in series to form a refrigerating cycle. The refrigerator also includes a second throttling device (124) connected in parallel with the refrigerator cooling unit, a first air fan (109) for sending cold air heat-exchanged by the refrigerator cooling unit (110) to the refrigerator compartment (102), a second air fan (107) for sending cold air heat-exchanged by the freezer cooling unit (108) to the freezer compartment (103), a suction duct (115) for introducing air inside the refrigerator compartment (102) to the refrigerator cooling unit (110), a discharge duct (116) for introducing air cooled by the refrigerator cooling unit (110) into the refrigerator compartment (102) and into the low-temperature storage chamber (133), and an electrically-operated damper (140) accommodated in the discharge duct (116). When the electrically-operated damper (140) is opened, an amount of air to be introduced into the low-temperature storage chamber (133) is greater than an amount of air to be introduced into the refrigerator compartment (102).