Abstract: Disclosed herein are a novel antibody and an antigen binding fragment thereof that targets CD30 to treat cancer, a chimeric antigen receptor, and a use thereof. The antibody, which binds specifically to CD30 that is highly expressed in cancer cells (specifically blood cancer), is very low in sequence homology with the CDR sequences of conventional CD30 targeting antibodies and thus has a unique sequence. Cells that express the chimeric antigen receptor including the anti-CD30 antibody or the antigen binding fragment responds to CD30-expressing positive cells to induce immune cell activity, thus finding advantageous applications as a CAR-immune cell product.