A dishwasher includes a storage part in which a washing target is stored. The storage part includes a guide disposed in an edge area, a frame coupled to the guide, and a tray coupled to the frame. The tray includes a locking portion protruding from an edge area thereof and coupled to the frame, and configured to elevate the tray with respect to the frame. The frame includes a slot in which the locking portion is inserted, and a rail protruding toward the slot and forming some area of an outer shape of the slot, and configured to guide the movement of the locking portion and suppress the locking portion from being separated from the slot.