detail meanwhile the controller 200 releases the electric power applied to the dish washer when one of the washing courses is not selected within a predetermined time after the electric power is applied to the dish washer as a result of the generation of a predetermined signal from the signal generator 110 this is because the electric power may be wasted when the application of the electric power to the dish washer is maintained in a case in which the electric power is applied to the dish washer without the intention of the user as in a case in which electric power is applied to the dish washer as a result of the generation of a predetermined signal from the signal generator 110 caused by the operation of the signal generator 110 due to a mistake or unintended action of the user or other unintended cause that is a user touches the signal generator 110 to apply electric power to the dish washer and select one of the washing courses through the input device 140 to perform the dishwashing at this time the controller 200 determines that the electric power has been applied to the dish washer without the intention of the user when one of the washing courses is not selected within a predetermined time after the electric power is applied to the dish washer and releases the electric power applied to the dish washer thereby preventing the waste of the electric power also the controller 200 releases the electric power applied to the dish washer only when a predetermined signal is generated from the signal generator 110 during the dishwashing and then another predetermined signal is generated from the signal generator.