Background: Considering the high incidence of impaired carbohydrate metabolism and the potential risk of diabetic complications posed to transport drivers, an attempt was made to assess the prevalence of diabetes among public transport drivers. Material and Methods: Medical records of 570 public transport drivers examined at an occupational health unit in one of the Polish towns with a population of 350.000 was the subject of analysis Results and Conclusions: The investigation revealed that 47.5% of the study population showed hyperglycemic conditions with the mean fasting glucose concentration of 99.9 mg/dl. A single case of abnormal glucose tolerance was diagnosed and 263 cases were recorded as hyperglycemia without fi nal diagnosis. Th e diabetes-related morbidity amounted to 1.4%, which was over three times as high as in the general population of the same age. Every four case of diabetes was diagnosed during prophylactic examinations. Moreover, 2.45% of the subjects had glycemia levels classified as diabetic (fasting glucose ≥ 126 mg/dl). The subject's age of more than 45 years and hyperglycemia revealed in previous laboratory fi ndings were found to increase the risk of impaired carbohydrate metabolism by three times. Med Pr 2008;59(4):271-277