Problem to be solved: to obtain the partition wall installation member, the partition wall installation structure and the partition wall installation method, which can facilitate the movement of the partition wall and to secure the interior design of the building.The lower end 16A of the partition wall 16 is supported by the support portion 28 of the partition wall installation member 24.The partition wall installation member 24 is provided with a mounting portion 30, and the installation portion 30 is supported by the upper surface 18a of the floor foundation member 18.Between the installation portion 30 and the support portion 28, there is provided an interval in which the flooring 40 can be inserted.Further, the support portion 28 and the installation portion 30 are connected by a connecting portion 32, and the floating ring 40 can be inserted between the support portion 28 and the installation part 30 in one direction in the thickness direction perpendicular to the height direction and the other side in the thickness direction.Diagram
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