Background: Patients with long-term complications of sulfur mustard (SM) poisoning are often less able to undertake optimum levels of physical activity and adequately control their dietary intake. The aim of present study was to investigate the dietary intake of patients with SM poisoning in comparison to a control group. Methods: The study was undertaken on 55 Iranian male veterans, who had > 25% disabilities due to long-term complications of SM poisoning and 55 men age-matched healthy subjects. A previously validated food frequency questionnaire (FFQ) was used for measuring dietary macro/micro nutrient intake for both groups; and the results were analysed using Dietplan6 software. Results: Analysis of macro/micro nutrients in dietary intakes of the patients versus the controls showed a significantly lower intake of several nutrients including selenium and carbohydrate. On the other hand, the dietary intake of trans-fatty acids and iodine were significantly higher in these patients. Conclusion: Long-term complications of SM poisoning in the Iranian veterans induce both chemical and physical disabilities. Macro/micro nutrient intake in these patients was significantly different in comparison with matched, healthy subjects. Dietary advice for these patients should be strongly recommended to these patients in order to prevent other chronic diseases.