There is provided a control apparatus capable of simply supporting/fixing a board by a board support, reducing a number of integrating steps, reducing cost and downsizing a board size.In a control apparatus constituted by attaching a board to a board support provided at a base attachably and detachably, the board support is constituted by a resin, and includes a guide having a section in an L-like shape provided at one side end portion of the board support, a hook having a section in an L-like shape provided at other side end portion of the board support, and a board mounting portion provided between the guide and the hook for supporting a lower face of the board. The guide includes an engaging portion engaged with one side end portion of the board mounted to the board mounting portion at an upper portion thereof. The hook includes an engaging portion engaged with other side end portion of the board mounted to the board mounting portion and provided with an elasticity, and the hook is constituted to be able to be inclined.