Abstract: There is disclosed an input device which prevent an operator's unintended operation without degrading operability, even when a plurality of operation input means is arranged close to each other so as to respond to various operations. When an input managing unit 25 receives an operation signal of a second input device 22 from a second input control unit 24, the input managing unit 25 determines whether a first input device 21 is being depressed or not from an operation signal from a first input control unit 23. Then if the first input device is being depressed, the operation signal from the second input device 22 is invalidated and discarded. Similarly, the operation signal from the second input device 22 is also invalidated until a given period has lapsed after the first input device 21 is released.