And to provide a fiber structure and a fiber-reinforced composite material capable of reducing costs. The fiber structure 10 includes a first fiber base material 11 including a body part 30 and a branch part 40, a second fiber base material 80, And a control unit that can control The second fiber base material 80 covers the branch part 40. The branch part 40 includes a first curved surface 42 separated from the second fiber base material 80. The first fiber bundle 12 is formed by winding a covering yarn 14 around a bundle of non-continuous fibers. The first curved surface 42 includes a portion where an interval between which the covering yarn 14 is wound is made wider than that of the body part 30. Figure 2

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