To solve a problem that a calling device for the disabled often executes erroneous calling by his/her erroneously touching a sensor, shielding a light when moving the body, emitting a large sound, etc., has an operation button for adjusting the sensitivity of the sensor detecting the calling, however, a patient or a nurse and the like touches the operation button to change the adjustment degree and cause the calling device often call incorrectly.

The sensitivity adjusting button having a function of adjusting the sensitivity of the sensor detecting the calling has the function for adjusting the sensitivity for a prescribed time from the start of the pushing, and has a means invalidating the operation of all the operation buttons, when the sensitivity adjusting button is continuously pushed down.

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