A short synthetic vector peptide of 25 residues has been developed comprising hydrophobic domain and a novel, nuclear localization signal for efficient delivery, devoid of any cytotoxicity. Using the vector peptide, the oligonucleotide/peptide complexes got delivered evenly in cytoplasm and nucleus in less than an hour and finally localizing completely into nucleus in two hours and protein (antibody) to cytoplasm within 1 hour in both primary (chicken embryo fibroblast) cells and established mammalian cell line (Vero cells).