Rectus sheath hematoma can be an unusual cause of abdominal mass that may present as an acute intra - abdominal problem. There are multiple causes and 1 with a tnrouqt: history, usually some precipitating factor can be identified. Hematoma is frequently due to rupture of Epigastric vesseles and only rarely to rupture of Rectus Abdominis muscle fibers. Misdiagnosis may result in the performance of unnecessary surgical procedures. Ultrasound examination, CT scan, and magnetic resonance imaging (MRI) are useful in making an accurate diagnosis. Treatment is usually conservstive.ln this paper, a case of spontaneous Rectus sheath hematoma during pregnancy is reported.