#$%^&*AU2012227230A120121011.pdf#####OBKO08 ABSTRACT It is intended to provide a promoter for inducing expression selectively and strongly in an immunocompetent 5 cell and/or a blood cell such as a lymphocyte. In the invention, the object was achieved by finding that HHV6 MIE promoter, HHV7 MIE promoter and HHV7 U95 promoter unexpectedly induce a specific expression in an immunocompetent cell and/or a blood cell such as a T 10 lymphocyte. By utilizing the promoters, a selective delivery of a DNA vaccine or the like can be realized.