A robot allowing an operator to refer to information required for inspections or the like without having to use a printed manual or a display screen of a teaching pendant. A display device has a flexible display screen that uses organic light-emitting diodes, a control unit, and a plug. The display device plug is inserted in a connector provided at a suitable location the robot arm, the display unit is lightly pressed onto the surface of the robot arm (the surface may be curved or flat) and a sticking part (an adhesive layer or magnetic layer) stuck onto and fixed to the surface. Instructions are transmitted from the teaching pendant to a robot controller. Electric power and signals are transmitted to the control unit through wiring and an image is displayed on the display unit. The technician carries on with the work of inspection while referring to the display screen. Alternatively, power may be supplied by battery and data exchanged by wireless communications. In addition, a holder that accepts and holds the display device may be provided on the robot arm.