To remarkably suppress leakage of washing water to the outside by unlocking a locking mechanism by pressing a pressing operation part.

This dishwasher is provided with: a door 52 for opening and closing the dish feeding port 30 of a washing tank 3; a locking mechanism 100 for locking the door 52 so as to prevent the door 52 from being opened when the port 30 is closed; a lock detection switch 57 for detecting locking of the door 52 by the locking mechanism 100; a nozzle of a nozzle arm 7 for jetting washing water toward dishes housed in the tank 3; a washing pump 10 for jetting the washing water from the nozzle when a locking state is detected by the switch 57; a motor 13 for driving the pump 10; an unlocking button 56 to be pressed for unlocking the lock by the locking mechanism 100; and a detection switch 103 for detecting driving of the locking mechanism just before to be energized so as to stop energizing the motor 13 before the locking mechanism 100 is moved for unlocking when the unlocking button 56 is pressed.