The invention discloses a dish washer, which comprises an upper door body which rotates upward with the upper fixing shaft of a cleaning tank as the center, a lower door body which rotates downward with the lower fixing shaft of a cleaning tank as the center, a linking part linking the upper and the lower door body, and a sealing component. The sealing component is clamped by the cleaning tank, the upper door body and the lower door body and conducts water sealing to the opening. The sealing component is formed by integrating an upper sealing part, a side sealing part and an angle sealing part, wherein the upper sealing part conducts water sealing to the upper part of the opening, the side sealing part conducts water sealing to the two sides of the opening, and the angle sealing part conducts water sealing to the angle of the opening. No joint part is disposed between the upper part, the angle part and the side part of the sealing component, thereby water leakage and steam leakage canbe prevented and good water sealing property is achieved.