本發明為提供一種含有衍生自腫瘤相關抗原L6(TAL6)之T細胞抗原表位的免疫肽,及編碼該免疫肽之核酸。該免疫肽及其編碼核酸可用作為一種供增強對抗表現TAL6之癌症細胞的免疫反應之免疫組成物的組成份。An immunopeptide containing a T cell epitope from the tumor associated antigen L6 (TAL6) and a nucleic acid encoding the immunopeptide. The immunopeptide and its encoding nucleic acid can be used as a component of an immune composition for enhancing immune response against cancer cells that express TAL6.