An antibody having neutralizing activity against influenza A virus, which comprises any one polypeptide sequence selected from the group consisting of the following polypeptide sequences: a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 1, a CDR2 region set forth in SEQ ID NO: 2, and a CDR3 region set forth in SEQ ID NO: 3, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 4, a CDR2 region set forth in SEQ ID NO: 5, and a CDR3 region set forth in SEQ ID NO: 6; a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 7, a CDR2 region set forth in SEQ ID NO: 8, and a CDR3 region set forth in SEQ ID NO: 9, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 10, a CDR2 region set forth in SEQ ID NO: 11, and a CDR3 region set forth in SEQ ID NO: 12; a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 13, a CDR2 region set forth in SEQ ID NO: 8, and a CDR3 region set forth in SEQ ID NO: 9, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 10, a CDR2 region set forth in SEQ ID NO: 14, and a CDR3 region set forth in SEQ ID NO: 6; and a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 15, a CDR2 region set forth in SEQ ID NO: 16, and a CDR3 region set forth in SEQ ID NO: 9, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 10, a CDR2 region set forth in SEQ ID NO: 17, and a CDR3 region set forth in SEQ ID NO: 12. a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 1, a CDR2 region set forth in SEQ ID NO: 2, and a CDR3 region set forth in SEQ ID NO: 3, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 4, a CDR2 region set forth in SEQ ID NO: 5, and a CDR3 region set forth in SEQ ID NO: 6; a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 7, a CDR2 region set forth in SEQ ID NO: 8, and a CDR3 region set forth in SEQ ID NO: 9, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 10, a CDR2 region set forth in SEQ ID NO: 11, and a CDR3 region set forth in SEQ ID NO: 12; a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 13, a CDR2 region set forth in SEQ ID NO: 8, and a CDR3 region set forth in SEQ ID NO: 9, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 10, a CDR2 region set forth in SEQ ID NO: 14, and a CDR3 region set forth in SEQ ID NO: 6; and a binding molecule composed of a light chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 15, a CDR2 region set forth in SEQ ID NO: 16, and a CDR3 region set forth in SEQ ID NO: 9, and a heavy chain comprising, as determined according to the Kabat method, a CDR1 region set forth in SEQ ID NO: 10, a CDR2 region set forth in SEQ ID NO: 17, and a CDR3 region set forth in SEQ ID NO: 12.