To make the quantity of lead arranged in a hollow part be easily increasable.

A lead support contained layered product 1 for a structure base isolation supporting means is provided with a hollow part 8 extending after passing through both rigid reinforced plates 2 and 3 as well as an elastic layer 4 and a rigid layer 5 and its one end 7 is sealed up, in a layered product 6 equipped with a pair of rigid reinforced plates 2, 3 and these elastic and rigid layers 4 and 5 arranged after being alternately layered in space between these plates 2 and 3, and lead 9 as a lead support is arranged in this hollow part 8, while another end 10 in a layered direction of the hollow part 8 is sealed up with a shear member 11 installed tight in the rigid reinforced plate 2 arranged at the side of the other end 10, and it is composed of installing a through hole 12 communicating the hollow part 8 with the outside in the center of this shear key member 11, and also installs a metering plug 13 for regulating a lead quantity of the hollow part 8 in this through hole 12.