Dishwasher

A dishwasher comprising:

• a tub defining a washing space;
• a sump provided to collect wash water injected into the tub;
• a supply pump provided to supply the wash water stored in the sump to the tub;
• and
• a filter provided in the sump and comprising:
• a first body having a plurality of first holes formed along a lateral circumferential surface;
• and
• a second body arranged in a radially inner side of the first body and having a plurality of second holes formed along a lateral circumferential surface,
• wherein the second body comprises an external wall portion in which the second holes are formed, and an internal wall portion positioned in a radially inner side of the external wall portion and extending vertically,
• wherein the internal wall portion extends downward below a lower end of the external wall portion, and
• wherein a plurality of ribs protrude radially outward from a lateral circumferential surface of the internal wall portion.