PROBLEM TO BE SOLVED: To provide a comfortable seat structure without making a sitting person feel pressure or uncomfortable on the back of thighs.;SOLUTION: A seat frame 1 in the seat structure of a chair having a net member 3 stretched over the top of the seat frame 1 consists of a frame-like rigid outer peripheral part 2 and a cushion material support part 10 extending inward in the horizontal direction from the inner edge 2e of the outer peripheral part 2 in the front. A thick cushion material 8 facing in the left/right directions is fixed on the cushion material support part, and a top 8a of the cushion material 8 is made to project upward from a top 2a of the outer peripheral part 2 and the net member 3 is stretched over tops of both the cushion material 8 and the outer peripheral part 2.;COPYRIGHT: (C)2005,JPO&NCIPI
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