A dishwasher comprising: a washing tub configured to wash dishes; a sump configured to store washing water injected toward the washing tub; a coarse filter located at a bottom plate of the washing tub and configured to filter foreign substances included in the washing water, and a micro filter capable of filtering foreign substances comprising smaller sizes than those of foreign substances filtered by the coarse filter, wherein the coarse filter comprises: a first coarse filter comprising filter holes through which the washing water that drops to the bottom plate passes, and is configured to protrude from the bottom plate of the washing tub; and a second coarse filter located below the first coarse filter and accommodated in a water storage chamber of the sump, wherein the second coarse filter is separable from the first coarse filter, and wherein the micro filter is provided outside the second coarse filter, wherein the first coarse filter is mounted over the sump, and characterized in that an interference portion is provided on an outside of the first coarse filter while protruding therefrom, and a fixing portion is provided at the sump through bending a side portion thereof inward, wherein the interference portion interferes with the fixing portion, thereby fixing the first coarse filter. J a washing tub configured to wash dishes; a sump configured to store washing water injected toward the washing tub; a coarse filter located at a bottom plate of the washing tub and configured to filter foreign substances included in the washing water, and a micro filter capable of filtering foreign substances comprising smaller sizes than those of foreign substances filtered by the coarse filter, wherein the coarse filter comprises: a first coarse filter comprising filter holes through which the washing water that drops to the bottom plate passes, and is configured to protrude from the bottom plate of the washing tub; and a second coarse filter located below the first coarse filter and accommodated in a water storage chamber of the sump, wherein the second coarse filter is separable from the first coarse filter, and wherein the micro filter is provided outside the second coarse filter, wherein the first coarse filter is mounted over the sump, and characterized in that an interference portion is provided on an outside of the first coarse filter while protruding therefrom, and a fixing portion is provided at the sump through bending a side portion thereof inward, wherein the interference portion interferes with the fixing portion, thereby fixing the first coarse filter. J a first coarse filter comprising filter holes through which the washing water that drops to the bottom plate passes, and is configured to protrude from the bottom plate of the washing tub; and a second coarse filter located below the first coarse filter and accommodated in a water storage chamber of the sump, wherein the second coarse filter is separable from the first coarse filter, and wherein the micro filter is provided outside the second coarse filter, wherein the first coarse filter is mounted over the sump, and characterized in that an interference portion is provided on an outside of the first coarse filter while protruding therefrom, and a fixing portion is provided at the sump through bending a side portion thereof inward, wherein the interference portion interferes with the fixing portion, thereby fixing the first coarse filter. J