A method of producing a fiber structure (21, 46), the fiber structure (21, 46) comprising: a liner including: a body portion having a cylindrical shape; a dome-shaped portion being continuous with at least one end of the body portion in an axial direction thereof; and a mouthpiece having a shape protruding from the dome-shaped portion in the axial direction of the body portion; and a fiber reinforcement base material (19, 40) formed of a fabric, the fiber reinforcement base material (19, 40) externally covering the body portion and the dome-shaped portion of the liner; warp yarns (22, 22a, 22b) arranged in such a way that a direction in which a yarn main axis of each of the warp yarns (22, 22a, 22b) in the body portion and the dome-shaped portion proceeds is a circumferential direction of the liner; and weft yarns (23, 23a, 23b) forming the fabric with the warp yarns (22, 22a, 22b), characterized in that the method of producing the fiber structure (21, 46) comprises: arranging the warp yarns (22, 22a, 22b) along the axial direction of the body portion and the dome-shaped portion of the liner, such that the warp yarns (22, 22a, 22b) and the weft yarns (23, 23a, 23b) are orthogonal to each other; inserting each of the weft yarns (23, 23a, 23b) into a shed formed between the warp yarns (22, 22a, 22b) adjacent to each other in the axial direction of the liner; pressing the inserted weft yarn (23, 23a, 23b) toward the liner by beating with a reed to weave the fabric out of the warp yarns (22, 22a, 22b) and the weft yarns (23, 23a, 23b); and winding the woven fabric around the liner by rotating the liner around a center axis of the liner. a liner including: a body portion having a cylindrical shape; a dome-shaped portion being continuous with at least one end of the body portion in an axial direction thereof; and a mouthpiece having a shape protruding from the dome-shaped portion in the axial direction of the body portion; and a body portion having a cylindrical shape; a dome-shaped portion being continuous with at least one end of the body portion in an axial direction thereof; and a mouthpiece having a shape protruding from the dome-shaped portion in the axial direction of the body portion; and a fiber reinforcement base material (19, 40) formed of a fabric, the fiber reinforcement base material (19, 40) externally covering the body portion and the dome-shaped portion of the liner; warp yarns (22, 22a, 22b) arranged in such a way that a direction in which a yarn main axis of each of the warp yarns (22, 22a, 22b) in the body portion and the dome-shaped portion proceeds is a circumferential direction of the liner; and weft yarns (23, 23a, 23b) forming the fabric with the warp yarns (22, 22a, 22b), characterized in that the method of producing the fiber structure (21, 46) comprises: arranging the warp yarns (22, 22a, 22b) along the axial direction of the body portion and the dome-shaped portion of the liner, such that the warp yarns (22, 22a, 22b) and the weft yarns (23, 23a, 23b) are orthogonal to each other; inserting each of the weft yarns (23, 23a, 23b) into a shed formed between the warp yarns (22, 22a, 22b) adjacent to each other in the axial direction of the liner; pressing the inserted weft yarn (23, 23a, 23b) toward the liner by beating with a reed to weave the fabric out of the warp yarns (22, 22a, 22b) and the weft yarns (23, 23a, 23b); and winding the woven fabric around the liner by rotating the liner around a center axis of the liner. arranging the warp yarns (22, 22a, 22b) along the axial direction of the body portion and the dome-shaped portion of the liner, such that the warp yarns (22, 22a, 22b) and the weft yarns (23, 23a, 23b) are orthogonal to each other; inserting each of the weft yarns (23, 23a, 23b) into a shed formed between the warp yarns (22, 22a, 22b) adjacent to each other in the axial direction of the liner; pressing the inserted weft yarn (23, 23a, 23b) toward the liner by beating with a reed to weave the fabric out of the warp yarns (22, 22a, 22b) and the weft yarns (23, 23a, 23b); and winding the woven fabric around the liner by rotating the liner around a center axis of the liner.