A drain pump capable of easily discharging air in the drain pump, and a washing machine having the same. The drain pump includes a washing water inlet compartment, a drain pump compartment configured to pump washing water contained in the washing water inlet compartment to an outside, a suction port provided between the washing water inlet compartment and the drain pump compartment to move the washing water from the washing water inlet compartment to the drain pump compartment, a drain line to connect the drain pump compartment to an outside to discharge the washing water, and an air outlet port provided on the drain pump compartment to discharge air contained in the drain pump compartment to an outside, wherein the air outlet port is connected to the drain line.