Filter assembly and refrigerator including the same

A water purification filter assembly comprising:

• a filter main body configured to be connected to an inlet port through which feed water is supplied and an outlet port through which purified feed water is discharged;
• a water purification tank arranged on one side of the filter main body and configured to store the purified feed water from the filter main body;
• a first casing configured to accommodate the water purification tank;
• a second casing configured to accommodate the filter main body;
• and
• a drain unit provided on one side of the filter main body to be attachable and detachable through one side of the second casing, and configured to collect moisture dropping from the filter main body,
• wherein the filter main body is coupled to a first end of a head unit which includes the inlet and outlet ports, and the drain unit extends over a second end of the head unit which is opposite to the first end thereof, and
• wherein the second casing includes a drawing hole dedicated to insertion of the drain unit into the second casing and withdrawal of the drain unit from the second casing.