Glucose-6-phosphate dehydrogenase (G6PD) is an enzyme, playing an important role in the redox metabolism of all aerobic cells. It was reported that certain medications, fava beans, and infections can trigger acute hemolytic anemia in patients with G6PD deficiency. An 8-year-old male patient was admitted to the hospital with blood in the urine, headache, dizziness, fatigue, loss of appetite, and jaundice in the eyes, 24 hours after eating large amounts of fresh, vetch grains. Laboratory investigation revealed hemolytic anemia, hyperbilirubinemia, and G6PD deficiency. Approximately 0.5% of fava bean seeds have 2 pyrimidine beta-glycosides called, vicine and convicine. Vetch has 0.731% vicine, 0.081% convicine, and 0.530% beta cyanoalanine glycosides. The aim of this case report is to emphasize the importance of vetch seeds as a cause for hemolytic crisis in our country, where approximately one million tons of vetch is produced per year, especially in the agricultural regions.