The novel azo-Schiff base ligand 2-((E)–(1H-benzo [d] imidazol-2-yl) diazenyl)-5-(E-4-(dimethyl amino) benzyliden amino) phenol,(BIADMebP) has been synthesized from condensation of 2-[(-2-benzimidazolyl) azo]-5-amino phenol with N, N-dimethyl benzaldehyde. The azo-schiff base ligand reacted with some divalent transition metal ions such us Co (II), Ni (II), Cu (II), Zn (II), pd (II) and pt (IV) forming six chelates complexes. The prepared azoschiff and its metal complexes where checked by different spectral technique in terms, CHN elemental analyses, metal content, magnetic moment measurements, molar conductance, FT-IR, UV-vis, 1H-NMR and mass spectra studies. The data show that the complexes have the composition of l: 2 [M: L] chelates type and octahedral geometry with Co (II), Ni (II), Cu (II), Zn (II) and Pt (IV) ions and l: l [M: L] cheats type and square planer geometry with Pd (II) ion. All complexes that non electrolytes and no conductive species excepted the Pt (IV)-complex is 1: 2 electrolyte nature. The pathogenic activities of the synthesized ligand (BIADMebP) and its complexes were tested invitro against the sensitive organisms Escherichia coli, staphylococcus as antibacterial and candida albicans, Aspergillus Niger as antifungal. The activity data show that the metal complexes higher anti bacterial and antifungus activity than the free ligand. The result are discussed.