Provided are a bending part (21) of an endoscope, and an endoscope (20). The bending part (21) of an endoscope comprises multiple bending blocks (10), which are connected end to end, wherein adjacent bending blocks (10) are connected by means of a connecting part (11), the connecting part (11) comprises a groove (12) and a bulge (13), and the bulge (13) is rotatably received in the groove (12). End faces of the bending block (10) are respectively provided with an abutting surface (14) on two sides of the connecting part (11), the bulges (13) rotate in a relative manner to the maximum angle in the grooves (12), and abutting surfaces (14) of two adjacent bending blocks (10) abut against each other, such that the two bending blocks (10) form the maximum bending angle therebetween and are in a locked state. Annular arms (15) are respectively provided on two sides of the bulge (13), annular slots (16) are respectively provided on two sides of the groove (12), and the annular arms (15) are correspondingly received in the annular slots (16). The annular arm (15) is rotatably received in the annular slot (16), and the angle corresponding to an arc-shaped sliding track of the annular arm (15) along the annular groove (16) is greater than or equal to the maximum angle of rotation of the bulge (13) relative to the groove (12). The bending part (21) of an endoscope can maintain a stable connection between two bending blocks (10).La présente invention concerne une partie de flexion (21) d'un endoscope, et un endoscope (20). La partie de flexion (21) d'un endoscope comprend de multiples blocs de flexion (10), qui sont reliés bout à bout, les blocs de flexion (10) adjacents étant reliés à l'aide d'une partie de liaison (11), la partie de liaison (11) comprenant une rainure (12) et un renflement (13), et le renflement (13) étant reçu de manière à pouvoir tourner dans la rainure (12). Les faces d'extrémité du bloc de flexion (10) sont respectivement munies d'une surface de butée (14
