Front end shell assembly, insertion part and endoscope

The invention provides a front end shell assembly, an insertion part and an endoscope, and belongs to the technical field of endoscopes. The front end shell assembly comprises a front end shell, a lighting unit, a marker and a release structure; the illumination unit, the marker and the release structure are all installed on the front end shell, the illumination unit is used for generating cross-linking light, the marker comprises a visual substance and a solid photosensitive cross-linking agent, at least part of the solid photosensitive cross-linking agent is located on the surface of the marker, the visual substance is used for providing a visual guiding effect, and the release structure is used for separating the marker from the front end shell. Therefore, the marker is separated from the front end shell. The marker is arranged to provide a visual guidance effect, when the insertion part is inserted into the human body for the second time, the image information is acquired through the camera module at the