Pump and dishwasher including the same

A dishwasher comprising:

• a tub configured to receive objects to be washed;
• a spray arm configured to spray water to the objects to be washed;
• a sump configured to store water;
• a supply unit configured to supply steam to the tub;
• a pump configured to supply the water stored in the sump to the spray arm, the pump comprising:
• a body;
• a partition wall configured to divide an interior of the body into a first chamber and a second chamber, the first chamber having an introduction portion communicating with the sump, and the second chamber having a discharge portion communicating with the spray arm;
• a communication hole formed through the partition wall to allow the first chamber and the second chamber to communicate with each other;
• an impeller provided in the second chamber to make water move to the discharge portion;
• a heater configured to heat the water inside the first chamber;
• and
• a steam discharge port configured to discharge steam generated in the first chamber to the supply unit,
• wherein the steam discharge port is located in the first chamber at a position higher than the introduction portion.