Diverse pharmacological properties are associated with 3H-1,3,4-oxadiazoline-2-thione derivatives, These include anticonvulsant14) and fungicidal" properties. On the other hand thiourea derivatives possess antiphyto-viral6), virucidal'), growth and herbicide"' activities. All these data prompted us to combine these moieties into a single molecule. The compounds synthesized were tested for their antimicrobial activities against seven microorganisms.