A tube fitting capable of absorbing vibration and shock resulting from a high pressure fluid passing through the tube fitting while it is used includes a connection head, a connection nipple, and an intermediate connection member. The connection head and the connection nipple are provided with an annular collar projecting from an end surface of the connection head and the connection nipple. The connection head, the connection nipple and the intermediate connection member are joined by inserting the annular collars into both ends of the intermediate connection member.