A dishwasher comprising: a tub defining a washing space; a sump configured to collect wash water injected into the tub; a supply pump configured to supply the wash water stored in the sump to the tub; a sump cover partitioning off the tub from the sump and configured to allow the tub to communicate with the sump via a communication hole; a support portion detachably secured to the communication hole and comprising a penetrating hole; and a filter device detachably provided in the communication hole of the sump cover and configured to filter the wash water collected by the sump, wherein the filter device comprises: a first body detachably secured to a second body of the filter device and having a plurality of first holes formed along a lateral circumferential surface; and the 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, characterized in that: the first body comprises a handle arranged across a top surface of the first body and a guide rib downwards extended under the handle of the first body, and the second body comprises an external wall portion in which the second holes are formed, an internal wall portion positioned in a radially inner side of the external wall portion and vertically extended, and a guide hole formed on a top surface of the second body and into which the guide rib is inserted. a tub defining a washing space; a sump configured to collect wash water injected into the tub; a supply pump configured to supply the wash water stored in the sump to the tub; a sump cover partitioning off the tub from the sump and configured to allow the tub to communicate with the sump via a communication hole; a support portion detachably secured to the communication hole and comprising a penetrating hole; and a filter device detachably provided in the communication hole of the sump cover and configured to filter the wash water collected by the sump, wherein the filter device comprises: a first body detachably secured to a second body of the filter device and having a plurality of first holes formed along a lateral circumferential surface; and the 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, characterized in that: the first body comprises a handle arranged across a top surface of the first body and a guide rib downwards extended under the handle of the first body, and the second body comprises an external wall portion in which the second holes are formed, an internal wall portion positioned in a radially inner side of the external wall portion and vertically extended, and a guide hole formed on a top surface of the second body and into which the guide rib is inserted. a first body detachably secured to a second body of the filter device and having a plurality of first holes formed along a lateral circumferential surface; and the 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, characterized in that: the first body comprises a handle arranged across a top surface of the first body and a guide rib downwards extended under the handle of the first body, and the second body comprises an external wall portion in which the second holes are formed, an internal wall portion positioned in a radially inner side of the external wall portion and vertically extended, and a guide hole formed on a top surface of the second body and into which the guide rib is inserted. the first body comprises a handle arranged across a top surface of the first body and a guide rib downwards extended under the handle of the first body, and the second body comprises an external wall portion in which the second holes are formed, an internal wall portion positioned in a radially inner side of the external wall portion and vertically extended, and a guide hole formed on a top surface of the second body and into which the guide rib is inserted.