Aim: We aim to evaluate osteopathy in patients with thalassemia major (TM) by performing bone mineral densitometry (BMD) and biochemical indices and to emphasize preventive measures and the importance of early diagnosis of osteoporosis. Material and Method: 37 TM patients (18 female, 19 male) were included in the study. The age, gender, biochemical parameters were recorded. BMD was determined using dual energy X-ray absorptiometry from lumbar vertebrae. Z scores were calculated automatically by the device. According to Z scores; <-1 was normal, -1-2 was osteopenia, >-2 was considered as osteoporosis. Results: 9 patients’ Z scores (24.3%) were normal, 5 patients were osteopenic (13.5%), and 23 patients were osteoporotic (62.2%). In the osteoporotic group, parathyroid hormone (PTH) was low in 2 patients (5.4%) and vitamin D was deficient in 12 (32.4%) patients. Lumbar BMD was positively correlated with age (r=0.625, P=0.000), height (r = 0.759, P =0.000), weight (r=0.830, P=0.000), and BMI (r=0.730, P=0.000), and was negatively correlated with ALP (r=-0.422, P=0.010). In the osteopenic group, vitamin D was deficient in 2 patients (5.4%); all other biochemical parameters were within normal limits. Lumbar BMD was positively correlated with age (r=0.625, P=0.000), height (r=0.759, P=0.000), weight (r=0.830, P=0.000), and body mass index (BMI) (r=0.730, P= 0.000), and was negatively correlated with alkaline phosphatase (ALP) (r= -0.422, P= 0.010). Discussion: Despite regular transfusions, osteopathy may occur at high rates in patients with thalassemia.