To reduce a table width and an installation space and to improve the visibility of a display.

A table-like body part 7a is provided with three stages of tables 7b-7d, the tables 7c and 7d of a middle stage and a lower stage are provided by being projected to the front surface side of the body part 7a from the table 7b of an upper stage. Also, the table 7c of the middle stage is made slidable relative to the back surface side of the body part 7a, a liquid crystal display 4 is mounted on the table 7b of the upper stage, an operation panel 2 is mounted on the table 7c of the middle stage, and a keyboard 3 is mounted on the table 7d of the lower stage. When operating the keyboard 3 on the table 7d of the lower stage, the table 7c of the middle stage is slid relative to the back surface side of the body part 7a.