A refrigerator comprising: an inner case configured to have a storage compartment formed therein; an outer case disposed outside the inner case and spaced a predetermined distance away from the inner case; a drain hose connected to one side of the inner case and disposed in an inner space formed between the inner case and the outer case; and a connector configured to connect the drain hose to the inner case, wherein the inner case comprises a first surface configured to form a rear surface of the storage compartment and a second surface connected to the first surface and configured to be at a first angle from the first surface towards the storage compartment, wherein the connector comprises a first connection surface and a second connection surface connected to the first connection surface and configured to be substantially at the first angle from the first connection surface, the first connection surface and the second connection surface configured to oppose and come into contact with the first surface and the second surface, respectively, when the drain hose is connected to the inner case, characterized in that the first surface comprises first fixing protrusions and the second surface comprises second fixing protrusions, wherein the first connection surface comprises first fixing holes and the second connection surface comprises second fixing holes, disposed to encompass the corresponding ones of the first fixing protrusions and the second fixing protrusions when the drain hose is connected to the inner case,wherein the connector is configured to be mounted and fixed on the inner case when the first fixing protrusions and the second fixing protrusions are inserted into the corresponding ones of the first fixing holes and the second fixing holes. an inner case configured to have a storage compartment formed therein; an outer case disposed outside the inner case and spaced a predetermined distance away from the inner case; a drain hose connected to one side of the inner case and disposed in an inner space formed between the inner case and the outer case; and a connector configured to connect the drain hose to the inner case, wherein the inner case comprises a first surface configured to form a rear surface of the storage compartment and a second surface connected to the first surface and configured to be at a first angle from the first surface towards the storage compartment, wherein the connector comprises a first connection surface and a second connection surface connected to the first connection surface and configured to be substantially at the first angle from the first connection surface, the first connection surface and the second connection surface configured to oppose and come into contact with the first surface and the second surface, respectively, when the drain hose is connected to the inner case, characterized in that the first surface comprises first fixing protrusions and the second surface comprises second fixing protrusions, wherein the first connection surface comprises first fixing holes and the second connection surface comprises second fixing holes, disposed to encompass the corresponding ones of the first fixing protrusions and the second fixing protrusions when the drain hose is connected to the inner case,wherein the connector is configured to be mounted and fixed on the inner case when the first fixing protrusions and the second fixing protrusions are inserted into the corresponding ones of the first fixing holes and the second fixing holes.