Disclosed is an antibody binding to human TWEAK, characterized by comprising CDR1H of SEQ ID NO:22, CDR2H of SEQ ID NO:23, CDR3H of SEQ ID NO:24 and CDR1L of SEQ ID NO:18, CDR2L of SEQ ID NO:19, CDR3L of SEQ ID NO:20, or by comprising CDR1H of SEQ ID NO:22, CDR2H of SEQ ID NO:74, CDR3H of SEQ ID NO:24 and CDR1L of SEQ ID NO:18, CDR2L of SEQ ID NO:19, CDR3L of SEQ ID NO:20, or by comprising CDR1H of SEQ ID NO:22, CDR2H of SEQ ID NO:75, CDR3H of SEQ ID NO:24 and CDR1L of SEQ ID NO:18, CDR2L of SEQ ID NO:19, CDR3L of SEQ ID NO:20. Also disclosed is the use of the antibody in the manufacture of a medicament for the treatment of cancer.