To enlarge a range of the application of a floating body structure.

In this floating body structure 11 being moored on the desired land 14 for utilizing its deck 2 as a container yard for the storage of containers 13 and the preserving equipment of vacant containers or the like 13 at a normal time, and being towed by a tugboat to the disaster-area in a state of loading disaster relief goods 22 thereon, and moored on the land 14 near the disaster- area to be utilized as a disaster supporting base in a disaster situation, projecting parts 6n and 6c at a sea side and a land side are formed on the deck 2 of the floating structure 1, a movable portal crane 6 is loaded on the projecting parts 6b and 6c for transferring goods between a ship 19A and the deck 2, and between the deck 2 and the land side 14, a storage 3 is installed for storing the disaster relief goods 22 inside, a number of pallets 8 are loaded and circulated in the storage 3, a pallet conveying device 7 is mounted for moving the pallets 8 to an carrying inlet and outlet port of the storage installed on the deck 2, and the disaster relief goods 22 are loaded and stored on the pallets 8.