Abstract: A portable dynamic advertising display system comprising an endless display path formed by an assembly of communicating track sections, adjustable supports including cross supports carrying the display path and drive means carried by one of the cross supports. A plurality of advertising signs are dependingly carried below the display path by roller assemblies carried along a guide rail disposed within the display path. The roller assemblies are connected to and carry an endless drive belt which moves the roller assemblies and dependent signs about the display path. The system is adapted for assembly and disassembly by a minimum of personnel and readily disassembled, transported and reassembled at a new site.