According to the centering mechanism of this invention for an electrically bendable endoscope, the control circuit, in response to an instruction for centering, computes residual bending angles in UD and LR directions based on the values obtained as a result of feeding values indicated by the UD and LR potentiometers to an AD converter. At least some of the slits are at one or more oblique angles to the edge. A gate of the MOS transistor is connected electrically to one of the drain and the source thereof in each stage, and a substrate for at least one pair of adjacent MOS transistors are connected electrically to one of the drain and the source of one of the pair. The drive member is further connected to the actuator.