To provide a floor structure making an noise when trod by a person walking on a floor after constructed.

A floor structure body comprises a floor material 1 (a woody flooring material) and a floor backing material 2 (an conifer plywood). An elastic material layer 4 containing silicon resin is laminated between the floor material 1 and the floor backing material 2, which has an cutting elongation of 50% or more in tension test based on JIS K 6301 and a permanent elongation of 10% or less in permanent set test based of JIS K 6301.