An operation device which can reliably prevent any motion of a robot in the real space unintended by the user. An operation device includes a touch screen to display an image of a robot model and to receive a touch input, a model motion execution section to cause the robot model to make a motion in response to a touch input made by touching a surface of the touch screen, a robot motion button for causing the robot to make a motion in the real space, a motion input detection section to detect an input to the robot motion button, and a real machine motion command section to output a command to cause the robot to make an identical motion in the real space to the motion of the robot model executed by the model motion execution section as long as inputs to the robot motion button are continuously detected.