We analyzed the CCR5-Δ32 polymorphism in patients with type 1 diabetes. We found significant negative association between type 1 diabetes and Δ32 allele. The frequency of Δ32 allele was the highest in a group with retinopathy. Δ32 carriers had higher levels of: HbA1c, inflammatory markers and adhesion molecules. The Δ32 allele increases the risk of diabetic retinopathy.