As known, azoic compounds represent a large class of synthetic organic compounds that contain azo group −N=N− as part of their molecular structures. Although the most typical field of utility remains their coloring function as dyes, they have found a large applicability due to their specific physico-chemical properties and biological activities such as: printing, food, pharmaceuticals, medicine, analytical chemistry, and high performance technology etc.[1]. Metal complexes of azo compounds suitably substituted in the o, o' positions constitute an important class of dyes. The most used transition metals to form metal complex azo dyes are Cu, Co and Cr especially in textile dyeing. The coordination complexes of azo dyes (direct, acid, reactive, etc.) with transition metals (Cu, Zn,Cr, Co, Ag, Cd etc.) are known to be involved in biological reactions, solar cell's, photo sensitizers's and chelats's obtaining, high density optical data storage, etc.[2] In this paper, the synthesis and characterization of one new copper complex of Amido black 10B, an azo acid dye as ligand, is presented. The proposed structure for the metal compound was elucidated by physico-chemical methods: FT-IR, UV-VIS, AAs spectroscopy, thermal analysis and XRD technique. Thermogravimetric and spectral analysis confirmed the formation of complex combination and its different stability in the air and nitrogen atmosphere. The UV-Vis spectra of the ligand and the complex confirm the formation of a squared planar complex with Cu (II) with high nitrogen stability.[3]