ENDOSCOPE

1 . An endoscope comprising:

an insertion unit having a bending portion on a distal end side thereof;

an endoscope main body provided on a proximal end side of the insertion unit;

a left-and-right direction bending mechanism coupled with the bending portion;

a left-and-right direction bending drive unit which generates drive force to bend the bending portion in a left-and-right direction;

a drive force transmission mechanism which transmits the drive force to the left-and-right direction bending mechanism; and

a cord portion which extends from the endoscope main body and supplies electrical power from the outside to the left-and-right direction bending drive unit,

wherein the left-and-right direction bending drive unit is provided on the endoscope main body and arranged along an extending direction of the cord unit.

2 . The endoscope according to claim 1 ,

wherein the endoscope main body has an operation unit which operates the bending portion,

the operation unit comprises:

an up-and-down direction bending operation input unit which is provided to a first shaft portion, which is protruded from a first position of the operation unit, to allow its revolving motion and to which an operation input for bending the bending portion in the left-and-right direction is input; and

a left-and-right direction bending operation input unit which is provided to a second shaft portion, which is protruded from a second position placed on the grip portion side apart from the first position of the operation unit to be substantially along a longitudinal axis direction of the endoscope main body, to allow its revolving motion and to which an operation input for bending the bending portion in the left-and-right direction is input, and

the up-and-down direction bending operation input unit is a rotary knob which is configured to perform a manual bending operation.

3 . The endoscope according to claim 2 ,

wherein at least one function switch is provided on an upper surface of the up-and-down direction bending operation input unit.

4 . The endoscope according to claim 1 ,

wherein the drive force transmission mechanism comprises a worm gear.

5 . The endoscope according to claim 1 , further comprising:

an up-and-down direction bending mechanism coupled with the bending portion;

an up-and-down direction bending drive unit which generates drive force to bend the bending portion in an up-and-down direction; and

a drive force transmission mechanism which transmits the drive force to the up-and-down direction bending portion,

wherein the cord portion supplies electrical power from the outside to the up-and-down direction bending drive unit, and

the up-and-down direction bending drive unit is provided on the endoscope main body and arranged along the extending direction of the cord portion.