Abstract: A continuous insertion weaving machine of the progressive shed type includes two coplanar endless chains which are supported and driven by two pinions. Coupling and uncoupling of the chains to the pinions is achieved by deflecting elements which cause a separation of the straight paths of the two chains. The chains move parallely along two shed tunnels which extend along the straight paths of both chains. The chains comprise means for moving driving elements of the shed tunnels, which driving elements, accompanied by the chains, act repeatedly in a cyclic manner within both shed tunnels.