A setting structure of setting laying floor material, characteristiced in that the floor material adjacent at the time of laying has a mounting groove mounting a fitting recess part member in parallel to a connection face on the setting rear reverse face end. A fitting recess member has a groove in the longitudinal direction of the bottom part, and a composite material has a rail-like projection forming a fitting projection part. A connection material is mounted between each fitting recess member of the adjacent floor material to connect the floor material, and laid on backing material through buffer material or a high specific gravity sheet. To provide a floor structure for floor heating on the rail-like projection of the composite material, and a buffer material can also be laid under the floor material. |