Fuel cell compound valve for vehicle

A fuel cell compound valve that opens and closes an inflow line and an exhaust line of a fuel cell stack for a hydrogen fuel cell vehicle, the fuel cell compound valve comprising:

• a support frame having a first bore to which the exhaust line is connected and a second bore to which the inflow line is connected;
• a first rotation valve configured to receive a driving torque of a driving motor installed in the support frame to open and close the first bore, the first rotation valve having a first shaft;
• a second rotation valve connected to the first rotation valve and configured to open and close the second bore, the second rotation valve having a second shaft;
• a first coupler protrusion protruding from the first shaft in a longitudinal direction thereof and having at least one first flat surface perpendicular to the longitudinal direction, the at least one first flat surface having a first area;
• a second coupler protrusion protruding in a first coupler protrusion direction from the second shaft and having at least one second flat surface with a second area smaller than the first area, the at least one second flat surface contacting the at least one first flat surface;
• and
• a stopper installed in the support frame and configured to fix a position of the second rotation valve.