A washing machine comprising a cabinet including a front cabinet , formed at a front side thereof, having a first insertion hole ; a tub provided in the cabinet , having a second insertion hole aligned with the first insertion hole ; a cabinet door attached to the cabinet , configured to rotate to open and close the first insertion hole ; a cabinet door lock provided on the front cabinet for maintaining a locking state of the cabinet door ; a tub door attached to the tub , configured to open and close the second insertion hole ; a tub door lock provided at a front side of the tub for maintaining a locking state of the tub door ; an unlocking unit provided in the cabinet door for releasing a locking state of the tub door when the cabinet door is opened; a hinge unit for elastically supporting the tub door in the opening direction of the second insertion hole ; a tub door lock releaser configured to release the locking state of the tub door lock ; and an anti-friction member provided on one among surfaces where the tub door and the cabinet door face each other, for preventing a direct friction between the tub door and the cabinet door , wherein the unlocking unit includes: a release lever provided in a grip portion of the cabinet door ; characterized in that the unlocking unit further includes a release switch for sensing opening of the cabinet door in accordance with an operation of the release lever ; wherein the tub door lock releaser is configured to release the tub door lock in accordance with sensing of the release switch . a cabinet including a front cabinet , formed at a front side thereof, having a first insertion hole ; a tub provided in the cabinet , having a second insertion hole aligned with the first insertion hole ; a cabinet door attached to the cabinet , configured to rotate to open and close the first insertion hole ; a cabinet door lock provided on the front cabinet for maintaining a locking state of the cabinet door ; a tub door attached to the tub , configured to open and close the second insertion hole ; a tub door lock provided at a front side of the tub for maintaining a locking state of the tub door ; an unlocking unit provided in the cabinet door for releasing a locking state of the tub door when the cabinet door is opened; a hinge unit for elastically supporting the tub door in the opening direction of the second insertion hole ; a tub door lock releaser configured to release the locking state of the tub door lock ; and an anti-friction member provided on one among surfaces where the tub door and the cabinet door face each other, for preventing a direct friction between the tub door and the cabinet door , wherein the unlocking unit includes: a release lever provided in a grip portion of the cabinet door ; characterized in that the unlocking unit further includes a release switch for sensing opening of the cabinet door in accordance with an operation of the release lever ; wherein the tub door lock releaser is configured to release the tub door lock in accordance with sensing of the release switch . a release lever provided in a grip portion of the cabinet door ; characterized in that the unlocking unit further includes a release switch for sensing opening of the cabinet door in accordance with an operation of the release lever ; wherein the tub door lock releaser is configured to release the tub door lock in accordance with sensing of the release switch . <EOS>