Endoscope system comprising an electrically bendable endoscope

An endoscope system, comprising:

• an electrically bendable endoscope in which a bendable portion is electrically bendable;
• bending input feeding means for giving an instruction as to a bending amount which includes a bending direction and a bending position which the bendable portion of the electrically bendable endoscope should take as a result of bending;
• driving means for bending the bendable portion based on the bending instruction signal from the bending input feeding means;
• detection means for detecting a bent state of the bendable portion;
• first driving power generating means which obtains a difference between the instructed bending amount given by the bending input feeding means and a value representing the bent state given by the detection means, and generates power for driving the driving means which is responsible for bending the bendable portion in accordance with the difference;
• second driving power generating means for generating a pulse driving power having a predetermined magnitude;
• and
• control means whose control includes selecting one of the first and second driving power generating means which have a characteristic of power generating activities according to said difference, and activating the thus selected driving power generating means so as to bend the bendable portion.