<p>[PROBLEMS] To easily recognize the positions of respective operation parts on an operation surface without confirming visually. [MEANS FOR SOLVING PROBLEMS] An operation detection part detects the operated states of the operation parts (11 to 19) arrayed on the operation surface (20) and having holes (11a to 19a) for jetting air. A control part (32) controls the jetting state of the air jetted from the holes (11a to 19a) by controlling the opening or closing state of a control valve (33) which is disposed between an air generator (34) generating the air and the holes at the respective operation parts (11 to 19) to control the air supplied from the air generator (34) to the holes at the operation parts (11 to 19).</p>
