PROBLEM TO BE SOLVED: To provide modified factor VII polypeptides and to provide uses thereof.SOLUTION: The invention relates to a modified factor VII (FVII) polypeptide or active fragments thereof comprising a substitution in a FVII polypeptide, wherein by the substitution of specific amino acids, the modified FVII polypeptide exhibits increased coagulation activity compared with an unmodified FVII polypeptides, and the increased coagulation activity is produced by increased resistance of the modified FVII polypeptide to the inhibitory effect of tissue factor pathway inhibitor (TFPI) and/or increased catalytic activity compared with an unmodified FVII polypeptide that does not contain a substitution of the amino acid.SELECTED DRAWING: None【課題】改変第VII因子ポリペプチド及びその使用の提供。【解決手段】第VII因子(FVII)ポリペプチド中の交換を含む、改変FVIIポリペプチド又はその活性断片であって、特定のアミノ酸の交換によって、前記改変FVIIポリペプチドが、非改変FVIIポリペプチドと比較して、増大した凝固活性を示し、前記増大した凝固活性が、前記アミノ酸の交換を含まない非改変FVIIポリペプチドと比較して、組織因子経路阻害因子(TFPI)の阻害効果に対する前記改変FVIIポリペプチドの抵抗性の増大及び/又は触媒活性の増大によって生じる、改変FVIIポリペプチド又はその活性断片を得る。【選択図】なし