A simple procedure for simultaneous determination of copper (II), Lead (II) and Zinc (II) by square wave voltammetry was studied. The voltammetric measurements were carried out using a hanging mercury drop electrode (HMDE) as working electrode, silver/silver chloride as reference electrode,platinum as auxiliary electrode and acetic acid-sodium acetate buffer (pH 5.0) as a supporting electrolyte.Result obtained the peak potential +0.03 V for Cu, -0.36 V for Pb and -0.97 V for Zn. The standardaddition technique was used for the analytical procedure. The application of this method was tested in synthetic and Thai-alcoholic beverage samples.