To provide a hand carrying operation device having a simple structure, excellent in operation property, and satisfactory appearance from a viewpoint of design.

This hand carrying operation device is electrically connected with a control panel by a cable and can be operated at a place apart from the control panel. It is provided with a main body case 2 of the portable operation device 1 in which an operation face having a plurality of cutout holes 4 on a front face is curved like circular arc, a flat key sheet 9 bonded to the curved operation face of the main body case 2, resin-made projecting parts 9a provided on an inner face of an operation part of the flat key sheet 9 and having different height, a tact key 5 provided in a lower part of the projecting part 9a, and a base 6 on which the tact key 5 is mounted. The tact key 5 is operated through the projecting part 9a by pressing the operation part of the flat key sheet 9.