NOVELTY - The system has a hydrogen recirculation line (28) formed in a manifold block (30) that is mounted on outside of a set of stack modules of a fuel cell stack (10). Components for supplying and discharging hydrogen and components for recirculating hydrogen are integrally mounted in predetermined positions of a hydrogen supply line (21), a hydrogen discharge line (25) and the hydrogen recirculation line to modularize the manifold block and the components of the system. A hydrogen supply valve (22) is mounted at an inlet of the hydrogen supply line on an upper surface of the manifold block.    USE - Hydrogen supply system for supplying hydrogen as a fuel to a fuel cell utilized in a fuel cell vehicle. Uses include but are not limited to a passenger vehicle such as sports utility vehicles (SUV), buses, lorries and commercial vehicles, watercraft such as boats and ships, aircraft, hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen-powered vehicles and petrol powered vehicles.    ADVANTAGE - The components are integrally mounted in the predetermined positions of the hydrogen supply line, the hydrogen discharge line and the hydrogen recirculation line to modularize the manifold block and the components of the hydrogen supply system such that overall volume and weight of the fuel cell system can be reduced, thus improving performance of the fuel cell vehicle by reducing a pressure loss occurring in the hydrogen supply line due to a reduction in length of the hydrogen supply line. The system is designed such that pipes of the hydrogen supply system separately connecting to the manifold block can be reduced while avoiding fitting for pipe connections, thus improving assembly efficiency.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a hydrogen supply system for a fuel cell with an integrated manifold block.'(Drawing includes non-English language text)'    Fuel cell stack (10)    Hydrogen supply line (21)    Hydrogen supply valve (22)    Hydrogen discharge line (25)    Hydrogen recirculation line (28)    Manifold block (30)