There is provided a highly convenient package for an optical module in which a device can be mounted as it is even when the number and mounting position thereof are different according to the device to be mounted. The package includes a base plate having a top surface on which devices are assembled, an optical fiber mounting component mounted on the top surface of the base plate, a direct current electrical interface component and a high frequency electrical interface component mounted on the top surface of the base plate. The optical fiber mounting component and the electrical interface components are separately manufactured, separately assembled on the top surface of the base plate, and fixed in different modes. The optical fiber mounting component is fixed by fastening with screws and fixed by soldering, and the electrical interface components are fixed by fastening with the screw.