Tube connection structure and endoscope

The utility model provides a tube connecting structure and an endoscope. The tube connecting structure and the endoscope can solve the problem that in the prior art, the gluing firmness between two tubes which are not matched in size is not high. The pipe connection structure includes: an outer pipe; the outer diameter of the inner pipe is smaller than the inner diameter of the outer pipe, and one end of the inner pipe is inserted into the outer pipe, so that a gluing gap is formed between the inner pipe and the outer pipe; the sleeving piece is arranged at the end, connected with the inner pipe in an inserted mode, of the outer pipe in a sleeving mode, and a glue pouring space communicated with the gluing gap is formed between the sleeving piece and the inner pipe; the gluing layer is located in the gluing gap so as to fixedly connect the inner pipe and the outer pipe; and the glue pouring layer is filled in the glue pouring space so as to be in contact with and bonded with the inner pipe, the sleeving piece