A cable supporting device for articulated vehicles, designed for installing in an intercommunicating compartment between two adjacent cabins of an articulated vehicle, including at least one cable-holder element, defining internally at least one channel for housing at least one cable, two anchoring plates connected or connectable to respective ends of the cable-holder element and each configured for stable mounting to a different end portion of the articulated vehicle, and at least one connecting element, positioned for connecting between at least one end of the cable-holder element and the respective anchoring plate. In particular, the connecting element is configured to allow a reciprocal movement, between the respective end of the cable-holder element and the respective anchoring plate, at least about two axes of rotation which are not parallel to each other and preferably perpendicular to each other.