A fiber structure body (11, 51, 61) including a multi-layered fabric having a plurality of fiber layers (31, 32, 311, 312, 331, 332) stacked in a stacking direction and having a multi-axial orientation, the multi-layered fabric including: axial-force directional yarns arranged in parallel with each other, main axes of the axial-force directional yarns extending in an axial-force direction in which a predetermined stiffness is required; orthogonal directional yarns arranged in parallel with each other, main axes of the orthogonal directional yarns extending in an orthogonal direction that is orthogonal to the axial-force direction and the stacking direction; and layer binding yarns arranged in parallel with each other, main axes of the layer binding yarns extending in a different direction from the main axes of the axial-force directional yarns and the orthogonal directional yarns, the layer binding yarns binding the plurality of fiber layers (31, 32, 311, 312, 331, 332), the multi-layered fabric being formed into a shape having a flat plate portion (21, 23, R2), and a bend portion (13, 22, R1) that is bent to the flat plate portion (21, 23, R2) and includes a surface intersecting with a surface of the flat plate portion (21, 23, R2), characterized in that the axial-force directional yarns are made of continuous fiber of reinforcing fiber, and the layer binding yarns that form the bend portion (13, 22, R1) are provided by spun yarns made of discontinuous fiber. the multi-layered fabric including: axial-force directional yarns arranged in parallel with each other, main axes of the axial-force directional yarns extending in an axial-force direction in which a predetermined stiffness is required; orthogonal directional yarns arranged in parallel with each other, main axes of the orthogonal directional yarns extending in an orthogonal direction that is orthogonal to the axial-force direction and the stacking direction; and layer binding yarns arranged in parallel with each other, main axes of the layer binding yarns extending in a different direction from the main axes of the axial-force directional yarns and the orthogonal directional yarns, the layer binding yarns binding the plurality of fiber layers (31, 32, 311, 312, 331, 332), axial-force directional yarns arranged in parallel with each other, main axes of the axial-force directional yarns extending in an axial-force direction in which a predetermined stiffness is required; orthogonal directional yarns arranged in parallel with each other, main axes of the orthogonal directional yarns extending in an orthogonal direction that is orthogonal to the axial-force direction and the stacking direction; and layer binding yarns arranged in parallel with each other, main axes of the layer binding yarns extending in a different direction from the main axes of the axial-force directional yarns and the orthogonal directional yarns, the layer binding yarns binding the plurality of fiber layers (31, 32, 311, 312, 331, 332), the multi-layered fabric being formed into a shape having a flat plate portion (21, 23, R2), and a bend portion (13, 22, R1) that is bent to the flat plate portion (21, 23, R2) and includes a surface intersecting with a surface of the flat plate portion (21, 23, R2), characterized in that the axial-force directional yarns are made of continuous fiber of reinforcing fiber, and the layer binding yarns that form the bend portion (13, 22, R1) are provided by spun yarns made of discontinuous fiber.