A dishwasher includes a storage and a moving mechanism that is coupled to and decoupled from a tub and configured to move in a front-rear direction of the tub. The moving mechanism includes a pair of first rollers provided in each lateral surface of the storage and configured to guide the moving of the storage, a guide provided in each lateral surface of the storage, under the first roller, and configured to guide the moving of the storage, and a guide rib disposed between an upper end of the first roller and a lower end of the guide. The guide rib is provided in each lateral surface of the storage and protrudes in a lateral direction of the storage.