Abstract: A robot emergency stop circuit for bringing the robot to an emergency stop through a deadman switch installed on a teaching control device while the robot is being taught behavior patterns through the teaching control device. The deadman switch (DM1) causes the robot to operate according to commands received from the teaching control device as long as a pressure applied by a finger remains within a specified range. When the finger pressure becomes lower or higher than the specified range, a magnet switch in a servo amplifier (2) is turned OFF, bringing the robot to an emergency stop. Accordingly, if the robot should unexpectedly move, causing an operator to take an unintended action such as flinging the teaching control device away or holding it tightly, and thus apply an abnormal pressure to the deadman switch (DM1), then the contact point of the deadman switch (DM1) is shifted from the middle point of three contact points, thus turning the switch OFF.