Hypertensive crisis in children is relatively a rare condition and the prevalence is currently unknown (1). The most common etiology of hypertensive crisis is secondary hypertension, while primary hypertension is less common (2)(5)(7). We performed a case report of 13 years old boy with hypertensive crisis caused by primary hypertension. He came to emergency unit of our hospital due to epistaxis, nausea, vomiting and abdominal pain. On the physical examination we found that the blood pressure was 180/110, his body weight was 60kg, the height was 154cm, and the BMI was 25,2 (categorized as overweight). The history of hypertension in his family was positive. On the further examination, the results of the laboratory finding, urinalysis and thorax x-ray was within normal limit. In the emergency unit, the patient was treated with nifedipine 5mg sublingual, furosemide injection 30mg. Patient was hospitalized at observational unit and discharged in fifth day with improvement and the blood pressure was 120/80.