NOVELTY - The attachment structure has a fixing element (4) that is arranged on structural portion (1) in fixed position with respect to structure arrangement surface (2). A rockable fixing element (3) is configured to support the structural portion in a freely swinging manner. The fixing element arranged on the structural portion is used as fixing element at another location and is affixed to a ferromagnetic element of the arrangement surface to support the structural portion, such that the structural portion is arranged and affixed at desired location on arrangement surface.    USE - Attachment structure such as solar cell module and container pallet (all claimed) used for cultivating plant, arranged on roof and balcony of house.    ADVANTAGE - The installation work and maintenance work of attachment structures can be performed easily, quickly, and safely. The durability with respect to natural phenomena such as wind and rain, fallen snow, and earthquakes is ensured, such that energy conservation and ecological lifestyle are facilitated at low cost. Since the structure is attached irrespective of direction of the roof to install, the benefit of sunlight can be received sufficiently, and the conversion efficiency of the solar cell module is improved. Since the need to make hole in metal plate, tile, or colonial is eliminated, the breaking of roof materials by the earthquake can be prevented and the leakage from plugged up location of the hole can be prevented. The attachment structure can be manufactured easily. The separation of the magnetic force fixing element and the ferromagnetic material element of the structure arrangement surface can be prevented effectively. Since the arrangement structure is simple, the number of workers and construction time and cost are reduced.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the attachment structure.    Structural portion (1)    Structure arrangement surface (2)    Rockable fixing element (3)    Fixing element (4)    Sheet steel (P)