To provide the connecting structure of a truss, which can be manufactured without requiring special processes and materials, by which the truss can be assembled temporarily and in which a joint bolt can be clamped simply, and the completion of the clamping of the joint bolt can be confirmed easily while the infiltration of water to the connecting sections of the truss and the generation of rust can be prevented.

A pipe 7, in which an end cone 6 with a joint-bolt inserting hole is mounted at an end section and which is made of a metal, and a ball joint 1 with a plurality of tapped holes 13 are connected by a joint bolt 2 and a collar 3 disposed on the outer circumference of the joint bolt 2. A pin 12 is buried to the shaft section of the joint bolt 2, a sliding groove 5 engaged with the pin 12 is formed to the inner circumferential surface of the collar 3, and a through-hole 9, into which a joint-bolt push bar 8, in which a front end is engaged with the thread groove of the joint bolt 2, is inserted detachably, is formed to the end cone 6 at that time.