To downsize and simplify a data input device for robot arm movement by solving the problem of a conventional master-slave method wherein the device is large-sized and too bulky for domestic use as the device because rods with respective lengths corresponding to a lower arm, an upper arm, a shoulder and a back are prepared, they are rotatably coupled to each other, each of them is equipped with a rotation sensor, and they are put on the whole body.

Small right and left simulating arm system having a rotation angle sensor attached to a joint is made and attached to both sides of a controller console. A finger holder is attached to a lower arm part. The finger holder is manipulated by the finger.

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