A bicopper (Ⅱ) complex Cu₂L₂Cl₂ with S-methyldithiocarbazate ligand was synthesized and characterized by various physical methods. It has been found that the complex has an activity of inhibition against some moulds bacteria and yeasts. Redox reactions on bilayer lipid membrane (BLM) modified by Cu₂L₂Cl₂ was investigated by cyclic voltammetry method and the action of electron carrier of this complex on BLM was reported.