Introduction: Nutritional education is an important matter for hemodialysis patients because it can change patient behavior and, therefore, improve nutritional status, decreasing risks of inadequate diets. Objectives: To evaluate the effects of a specific nutritional education program developed for patients undergoing hemodialysis and the changes that may be induced by the program. Methodology: The effects of the nutritional education program were studied in 27 hemodialysis patients (13 men) with mean age of 50.2±13 years. Before and after the nutritional program, patients answered feed surveys and had their basic nutritional knowledge, laboratory test results, and interdialytic weight gain evaluated. The educational nutrition program itself was evaluated by questioning patients on their impressions and perceptions on the course. Results: A low level of knowledge of nutritional basic aspects was observed before the course, while a significant improvement of understanding was verified after the course (24% and 60% of correct answers before and after the course, respectively; p<0.0001). It was possible to observe a significant reduction of the blood potassium level after the course (5.2±0.9 vs 4.7±0.7mEq/L; p=0.029, before and after the course, respectively), but other laboratory variables were not modified. The feed questionnaire and the interdialytic weight gain were similar in both moments: pre and post course. The evaluation of the course by the patients was extremely positive. Conclusions: The educational nutrition program promoted a gain of knowledge in nutritional aspects for dialysis patients, but it did not foster significant changes in the quality or amount of food intake, interdialytic weight gain, and laboratorial levels. A positive assessment of the program was observed. It is possible that changes in the nutritional aspects and laboratorial levels demand more monitoring time.