The coordination product Cu(tmpbi)2Cl2 was created when 2-(p-thiomethyl phenyl) benzimdazole (tmpbi) was reacted with the appropriate metal halides. The complex has been characterized using element analysis, conductance measurements, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, and magnetic susceptibility tests. It has been suggested that the complex has a tetrahedral shape. Tmpbi is a ligand that exhibits N-benzimidazole coordination. The ligand and its Cu complex were tested for their antimicrobial (antibacterial) capabilities in vitro against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacterial strains using the paper disc diffusion technique. Both of these bacteria are known to cause illnesses in humans, including dysentery and food poisoning, so they were selected for study. The copper (II) complex is more potent against Escherichia coli and Staphylococcus aureus than the ligand. More activity is shown in the complex than in the free ligand.