<p>A dishwashing machine is provided with: an operation unit for inputting an instruction for the dishwashing machine; a control unit covered with a cover, performing the operational control of the dishwashing machine on the basis of control information inputted in the operation unit; and a display unit for displaying the operational state of the dishwashing machine. The control unit has: a memory for enabling information relating to the state of operational process to be written therein and read therefrom; and a memory control unit for enabling information written in the memory to be operated with the cover removed and causing the information to be displayed on the display unit.</p>
