The present invention addresses the problem of providing chimeric antigen receptor (CAR)-expressing T cells that express a CAR and also express a T cell immunological function promoting factor, and that have a strong immunity-inducing effect and high antitumor activity. The present invention also addresses the problem of providing a CAR expression vector for producing such CAR-expressing T cells. This CAR expression vector contains a nucleic acid that codes for a CAR, and a nucleic acid that codes for a T cell immunological function promoting factor, wherein the nucleic acid that codes for the T cell immunological function promoting factor comprises either: the nucleic acid that codes for interleukin-7 and the nucleic acid that codes for CCL19； a nucleic acid that codes for a dominant-negative mutant of SHP-1； or a nucleic acid that codes for a dominant-negative mutant of SHP-2. CAR-expressing T cells into which said CAR expression vector has been introduced are produced.
