An input and output device includes: an operation unit that is disposed on a front side and that receives data input by an operator; and a table unit that is disposed further forward than the operation unit and that protrudes in a forward direction. The table unit includes: a notched portion that is provided on a first side in a left-right direction and that opens forward and upward; and a recessed portion that is provided on a second side in the left-right direction, the first side being opposite to the first side, the recessed portion comprising an upper surface having a recessed shape.