To provide a spherical body containing structure capable of effectively reusing spherical bodies such as spent hard tennis balls and contributing to the solution of an environmental problem due to the hard tennis balls disposed of an noncombustible refuse.

This buffer spherical body containing structure 10 for loading a heavy material is characterized by having a plurality of spherical bodies 11 having elasticity (preferably, to have a structure of sealing air in its inside) and a retainer member 12 integrally retaining the plurality of spherical bodies 11.