Fuel cell device and vehicle

A fuel cell device comprising:

• a fuel cell stack;
• auxiliary components connected to the fuel cell stack;
• and
• a support member configured to support the fuel cell stack and the auxiliary components, the support member being attachable to an attachment target, wherein
• the fuel cell stack is attached to an upper surface of the support member, and
• the auxiliary components includes:
• a cooling system component configured to circulate a coolant through the fuel cell stack;
• and
• reactant gas system components including an oxygen-containing gas system component configured to supply an oxygen-containing gas to the fuel cell stack and a fuel gas system component configured to supply a fuel gas to the fuel cell stack, wherein
• the cooling system component is attached to a lower surface of the support member, and
• at least a part of the reactant gas system components is arranged below the cooling system component.