Abstract: Hyperemesis gravidarum may prompt hypovolemia and significant electrolyte anomalies. Hypokalemia is one of the most common abnormalities. When practical, it may lead to rhabdomyolysis. We report a rare case of rhabdomyolysis in a 24 years old pregnant woman due to hyperemesis gravidarum. She had a profound weakness. Physical examination and laboratory findings showed a need for the hospital admission. Aggressive rehydration and electrolytes were the definite treatment. Her serum creatinine kinase (CK) concentration during entry was 80,01 units/L. Continuous rehydration led to complete recovery clinically. On discharge, she had normal laboratories.