Disclosed are a rack assembly capable of enhancing usability by improving a rack assembly structure, and a dishwasher having the rack assembly. The dishwasher includes: a washing tub; and a rack assembly provided inside the washing tub, wherein the rack assembly includes: a frame; a tray on which dishes are accommodated and which is movably supported on the frame; and a link unit connecting the frame to the tray and moving the tray to one of a first location and a second location that is lower than the first location, the link unit being rotatably coupled with the frame and the tray.