The present invention pertains to a monoclonal antibody, or an antibody fragment thereof, that binds specifically to human growth arrest-specific 6 (hGas6) and binds to at least one amino acid residue among the 314th, 315th, and 316th amino acid residues of human Gas6. The present invention also pertains to: a nucleic acid containing a base sequence that codes for the antibody or the antibody fragment； a transformed cell containing a vector that contains the nucleic acid； a method for producing the antibody or the antibody fragment； reagents for detecting or measuring Gas6 that contain the antibody or the antibody fragment； therapeutic or diagnostic agents for Gas6-related diseases that contain the antibody or the antibody fragment as an active ingredient； and a use of the antibody or the antibody fragment for producing the therapeutic or diagnostic agents for Gas6-related diseases.本發明係關於一種單株抗體或該抗體片段，該單株抗體係與人類生長抑制特異性蛋白6(hGas6，Human Growth Arrest Specific 6)特異性地結合之抗體，並且與人類Gas6之第314號、第315號及第316號胺基酸殘基中之至少一個胺基酸殘基結合；包含編碼上述抗體或抗體片段之鹼基序列之核酸；包含含有上述核酸之載體之轉形細胞；上述抗體或抗體片段之製造方法；包含上述抗體或抗體片段之Gas6之檢測或測定用試劑；包含上述抗體或抗體片段作為有效成分之Gas6相關疾病之治療藥或診斷藥；或用以製造Gas6相關疾病之治療藥或診斷藥之上述抗體或抗體片段之用途。
