To provide a housing for a computer system easy to use.

The housing 11 is constituted by arranging a display window in front, a table 17 capable of putting in and taking out under the display window, and a drawing out part 21 having a printing paper discharge port 23 under the table 17. A display supporting part supporting a display so that a display screen faces the display window and a printer supporting part supporting a printer arranged in the drawing out part 21 are installed on the inside of the housing 11. The table 17 has a space capable of housing a keyboard 27, and is capable of selecting and fixing either one of a first position capable of putting a mouse, a second position capable of operating the mouse, and a third position capable of operating the mouse and the keyboard.