To provide a tube connective structure for an endoscope which can firmly connect a flexible tube and a member to be connected without heating.

A tube fitting hole 21 having a size into which a flexible tube 1 can be fittingly inserted is formed on the side of the member 2 to be connected, a stopping face 22 where an end face of the flexible tube 1 comes to the end is formed inside of the tube fitting hole 21, a connective cylindrical body 3 whose nose end side 31 has a size able to pass through inside of the stopping face 22 and whose base end side 33 has a size unable to pass through inside of the stopping face 22, is inserted into the tube fitting hole 21 from the opposite direction of the flexible tube 1, and the nose end side 31 portion of the connective cylindrical body 3 is pressed into the flexible tube 1.