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.