In Iran, UHT milk widely consumed by Iranian population of all ages. The presence of beta lactam antibiotic residues in UHT milk has a potential hazard for the consumer in any age. For this study one hundred fifty UHT milk samples were collected from Tabriz milk stores from June 2010 to October 2010 by systematic random sampling methods. All samples were examined by Beta star screening kit (Neogen, USA). Of all samples 7(4.66%) were positive for beta lactam antibiotic residues in UHT milk in the northwest region of Iran. This study showed that the effective monitoring program must be run in the northwest region of Iran for control of beta lactam antibiotic residues presence in UHT milk
