PURPOSE: To reduce equipment and materials of frame body, improve accuracy of loading position, and shorten construction period, by assembling equipments into a prescribed sized frame bodies for modularization, and loading them along guide rails used as part of strength member provided in an engine room.

CONSTITUTION: Equipments related to a marine engine room are assembled into frame bodies 4 for modularization. Meanwhile, on the front wall 1 and the deck 2 of the engine room adjacent to the space to be loaded and equipped with the frame bodies 4, guide rails 3, 3... are respectively provided in the longitudinal direction and at intervals corresponding to the size of the frame body 4. The frame bodies 4 are equipped between these guide rails 3, 3... utilizing the guide rails 3,3.... Hereby, connecting members are unnecessary, equipment work is facilitated, and accuracy is improved.