An object of the present invention is to provide an antigen delivery complex or a drug delivery complex, which is safe, has a high titer, and permits large-scale production and preservation and is a cell- or organ-oriented.The present invention provides an antigen or drug delivery complex containing a complex of an antigen or drug and a cationic molecule, and an anionic molecule encapsulating the same, and oriented to a cell or organ. The antigen or drug delivery complex of the present invention can be used as a main component of a drug delivery system that delivers various antigens and drugs to a particular cell or organ.
