A refrigerator comprising: a heat exchanger comprising a refrigerant tube in which a refrigerant flows and a heat exchange fin into which the refrigerant tube is inserted; a temperature sensor disposed on an inlet-side or outlet-side of the heat exchanger to detect a temperature of the refrigerant; and a fixing device for fixing a guide tube disposed on an inlet-side or outlet-side of the refrigerant tube and the temperature sensor in a state where the guide tube is in contact with the temperature sensor , wherein the fixing device comprises: - a tube support unit supporting the guide tube , the tube support unit including a tube rib surrounding at least one portion of the guide tube ; and - a sensor support unit supporting the temperature sensor , the sensor support unit including a sensor rib extending from the tube support unit to surround at least one portion of the temperature sensor , characterized in that : the fixing device further comprises: - at least one frame comprising a first frame and a second frame spaced apart from each other, and wherein: - a space part in which the guide tube is disposed between the first and second frames , - each of the first and second frames is rounded to correspond to a shape of the guide tube , and - the tube rib extends from the first frame to support the guide tube , and a sensor rib is coupled to the tube rib and extends from the second frame to support the temperature sensor , - a reinforcing rib extending from a rounded portion of the first frame to a rounded portion of the second frame ; and - a guide rib spaced apart from the tube rib and the sensor rib to support a portion of the guide tube that is not in contact with the temperature sensor , the guide rib being configured to extend from the first frame to the second frame and is rounded in a semicircular shape. - a tube support unit supporting the guide tube , the tube support unit including a tube rib surrounding at least one portion of the guide tube ; and - a sensor support unit supporting the temperature sensor , the sensor support unit including a sensor rib extending from the tube support unit to surround at least one portion of the temperature sensor , - at least one frame comprising a first frame and a second frame spaced apart from each other, and wherein: - a space part in which the guide tube is disposed between the first and second frames , - each of the first and second frames is rounded to correspond to a shape of the guide tube , and - the tube rib extends from the first frame to support the guide tube , and a sensor rib is coupled to the tube rib and extends from the second frame to support the temperature sensor , - a space part in which the guide tube is disposed between the first and second frames , - each of the first and second frames is rounded to correspond to a shape of the guide tube , and - the tube rib extends from the first frame to support the guide tube , and a sensor rib is coupled to the tube rib and extends from the second frame to support the temperature sensor , - a reinforcing rib extending from a rounded portion of the first frame to a rounded portion of the second frame ; and - a guide rib spaced apart from the tube rib and the sensor rib to support a portion of the guide tube that is not in contact with the temperature sensor , the guide rib being configured to extend from the first frame to the second frame and is rounded in a semicircular shape. <EOS>