Hydatid disease, mostly caused by Echinococcus granulosus, is a common parasitic infestation of the liver. In this type of infectious disease, humans are an intermediate host. Although most common sites are liver (70%) and lungs (25%), this parasitic tapeworm can be seen at any region of the body. Intraperitoneal cysts are usually secondary to the rupture of primary cysts, but primary hydatid cysts of the mesentery are very rare (%2). Herein, we aimed to report a giant primary hydatid cyst in a male patient, treated surgically without any complications.