Abstract: An open type module structure of a fuel cell power pack is provided. The open type module structure of a fuel cell power pack may include a body frame, a fuel tank accommodating part disposed on a central portion of the body frame to accommodate a fuel tank, stack accommodating parts disposed at both sides of the body frame to accommodate a stack of fuel cells, a control panel disposed at a bottom of a front portion of the body frame, a valve detachable part disposed on the front portion of the body frame and configured to be connected to a regulator valve of the fuel tank, and a manifold part disposed on the front portion of the body frame to connect the valve detachable part with the stack of fuel cells.