The present invention desirably provides CAR-expressing T cells that coexpress a chimeric antigen receptor (CAR) and a T cell immune function-enhancing factor and have a high immunity-inducing effect and antitumor activity, and desirably provides a CAR expression vector for the preparation of the CAR-expressing T cells. The CAR expression vector comprises a nucleic acid encoding a chimeric antigen receptor (CAR) and a nucleic acid encoding a T cell immune function-enhancing factor, wherein the nucleic acid encoding an immune function-enhancing factor is a nucleic acid encoding interleukin-7 and a nucleic acid encoding CCL19. The CAR may comprise a single chain antibody that recognizes a cell surface antigen on a cancer cell, a transmembrane region, and a signal transduction region that induces the activation of a T cell.
