Provided is an endoscope apparatus that includes: a bending portion that bends in at least one direction bending wires that are each connected to the bending portion actuators that are connected to proximal ends of the bending wires, respectively, and that contract or expand by means of air pressure electromagnetic valves that are provided between the actuators and a gas supply source that supplies air, respectively, and that adjust pressures applied to the actuators and a control section that controls the electromagnetic valves. Each bending wire has slack therein when the actuators are in an atmospheric pressure state. The control section controls the electromagnetic valves so as to subject the actuators to initial pressurization until the slack of each bending wire disappears.
