An electric bending endoscope device 1 includes an endoscope 2 with a driving unit 13, a control unit 3 and an operation portion 9 with a bending instruction portion 9A. The operation portion 9 includes a correction algorithm calculating portion 40 in which the output range of instruction signal of the joystick 9A is converted to coincide with the predetermined output range of the bending instruction portion instruction-signal being the operation signal outputted by the operation portion 9 according to the joystick 9A being the bending instruction portion to be fitted to the operation portion 9, to generate the bending instruction portion operation-signal.
