To provide a cross-binding structure which is improved so that it can bind the cross section of a wire harness simply and quickly and can keep the binding condition stably for a lone term.

In this cross-winding structure, the band main part 32 of a binding band V2 is passed into the threading hole 7 of a band V1 for cross binding, and a band main part 2 is turned and passed into a corresponding locking hole 3a thereby binding a harness, in condition that it spans the fellow corners sk1 and sk3 of a cross section B, and besides the band main part 32 of a binding band V2 is turned and passed into a corresponding threading locking hole 33a thereby binding the harness in condition that it spans the residual fellow corresponding corners sk2 and sk4, when cross-binding the cross part B of the wire harness W, using the binding band V2, where a lock part 33 having the threading locking hole 33a for threading it from its tip 32a and locking it in slip stop state is provided integrally at the base end of the plastic band main part 32, and the band V1 for cross binding.