A dishwasher in which a user conveniently adjusts tension of a spring according to various materials or weights of a cover coupled to a door. The dishwasher includes a housing, a door rotatably mounted to a front surface of the housing, door hinges mounted to both sides of a lower portion of the door and rotatably coupled to the housing, springs connected to the door hinges and arranged at both side portions inside the housing, a wire to connect the springs, a shaft configured to rotate and having one end portion exposed outside the housing, a first rotation member connected to the other end portion of the shaft and formed with a worm, and a second rotation member engaged with the worm and connected to the wire. Tension of the springs is simultaneously adjusted by changing a length of the wire by rotation of the shaft.