A dishwasher comprising: 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 at both side portions inside the housing in order to adjust movement of the door; a connection member to connect a first spring to a second spring; a shaft configured to rotate and having one end portion which is exposed outside the housing; a first rotation member connected to the other end portion of the shaft; and a second rotation member engaged with the first rotation member and connected to the connection member, wherein the connection member is a wire, and the shaft, the first rotation member and the second rotation member are configured such that tension of the springs is simultaneously adjusted by changing a length of the wire by rotation of the shaft, each of the door hinges includes a hinge bracket coupled to the lower portion of the door, a rope having one end portion connected to the hinge bracket and the other end portion connected to each of the springs and a support bracket provided at the housing, the support bracket includes a stopper unit configured to contact the hinge bracket, thereby keeping the door opened at a constant angle, the stopper unit includes a stopper body to restrict rotation of the hinge bracket of the door hinge and an elastic part to apply elastic force to the stopper body, the stopper body includes a rotation part configured with a rotation shaft, a rotation support part configured to contact the hinge bracket to restrict rotation of the door hinge, and a front surface of the rotation support part is formed in an arc shape which protrudes forward, whereby when the door is being closed, a hinge connection part of the hinge bracket moves by being guided by the arc-shaped front surface of the stopper body. 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 at both side portions inside the housing in order to adjust movement of the door; a connection member to connect a first spring to a second spring; a shaft configured to rotate and having one end portion which is exposed outside the housing; a first rotation member connected to the other end portion of the shaft; and a second rotation member engaged with the first rotation member and connected to the connection member, wherein the connection member is a wire, and the shaft, the first rotation member and the second rotation member are configured such that tension of the springs is simultaneously adjusted by changing a length of the wire by rotation of the shaft, each of the door hinges includes a hinge bracket coupled to the lower portion of the door, a rope having one end portion connected to the hinge bracket and the other end portion connected to each of the springs and a support bracket provided at the housing, the support bracket includes a stopper unit configured to contact the hinge bracket, thereby keeping the door opened at a constant angle, the stopper unit includes a stopper body to restrict rotation of the hinge bracket of the door hinge and an elastic part to apply elastic force to the stopper body, the stopper body includes a rotation part configured with a rotation shaft, a rotation support part configured to contact the hinge bracket to restrict rotation of the door hinge, and a front surface of the rotation support part is formed in an arc shape which protrudes forward, whereby when the door is being closed, a hinge connection part of the hinge bracket moves by being guided by the arc-shaped front surface of the stopper body.