Endoscope bending portion and endoscope

An endoscope bending portion comprising a plurality of bending elements connected in a longitudinal axis direction;

• and
• a first pulling wire configured to bend the plurality of bending elements in a first bending direction;
• wherein a first bending element of the plurality of bending elements comprising:
• a first outer circumferential surface;
• a first inner circumferential surface;
• and
• a first wire accommodating groove extending from a first opening on the first outer circumferential surface;
• wherein the first wire accommodating groove extending from the first opening on the first outer circumferential surface in a first direction on a first side relative to a first bending plane having the first bending direction;
• a second bending element of the plurality of bending elements comprising:
• a second outer circumferential surface;
• a second inner circumferential surface;
• and
• a second wire accommodating groove extending from a second opening on the second outer circumferential surface;
• wherein the second wire accommodating groove extending from the second opening on the second outer circumferential surface in a second direction on a second side relative to the first bending plane, the second side being opposite to the first side;
• wherein the first bending element and the second bending element are disposed adjacent to each other in the longitudinal axis direction, and
• the first pulling wire is disposed in both of the first and second wire accommodating grooves.