A reactor cover, and a hydrogen generating apparatus and a fuel cell power generation system having the reactor cover are disclosed. The reactor cover includes a base panel; a control unit, which is coupled to one side of the base panel, and which regulates a reaction for generating the hydrogen; a circuit pattern buried in the base panel in electrical connection with the control unit; and an electrode pad formed on the other side of the base panel in electrical connection with the circuit pattern. In the reactor cover, the base panel and the control unit may be integrated, to eliminate unnecessary wiring, prevent short-circuiting, and consequently provide a reactor cover that can be fabricated and used more easily.