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Background: Diet can be an important factor in the prevention and treatment of chronic (COPD). The American Lung Association obstructive pulmonary disease (COPD). The recommends eating 20-30 grams of fiber per day, from nuts, seeds, fruits, vegetables, bread, and pasta. Good sources of protein, like milk, eggs, cheese, meat, fish, poultry, nuts, and dried beans or peas, can help maintain strong respiratory muscles. Other foods and nutrients that may be beneficial for COPD include: Whole grains, Minerals, Vitamin D, Coffee, and Fish and n-3 polyunsaturated fatty acids. Objectives: 1. To assess the knowledge regarding COPD among patients. 2. To evaluate the effectiveness of Nutritional counseling on knowledge regarding COPD. 3. To find the association between knowledge scores with selected socio demographic variables. Hypothesis: H1: There is significant difference between pre-test and post-test knowledge score regarding Nutritional counseling among COPD patients at 0.05 level of significance. H2. There is significant association between level of knowledge with selected socio demographical variables of COPD patients at 0.05 level of significance. Methodology: The research design consisted of pre-experimental research design of one group pretest and post-test design. The population selected for the study was COPD Patients of selected areas at Vijayapur district. The study samples were 60 COPD Patients and were selected by using purposive sampling technique. The development of the tool involved steps of test construction i.e. preparing the blue print, selection of items, content validation and establishment of reliability. The content validity of the questionnaire was done and modifications were done according to the suggestions given by the experts. Pre-testing and reliability of the tools were done. The reliability coefficient of the knowledge questionnaire was found to be 0.893.The tool was found to be reliable. Results: In the pretest, level of knowledge of COPD patients living in selected areas at Vijayapur district before using Nutritional counseling. In that Majority 57(95.0%) of the COPD patients. had Inadequate knowledge and 3(5.0%) of the COPD patients had moderately adequate knowledge and there were no COPD patients having adequate knowledge regarding Nutritional counseling of COPD patients. After Nutritional counseling majority 47(78.3%) had adequate knowledge regarding Nutritional counseling, 6(10.0%) had moderately adequate knowledge and only 7(11.7%) remained with inadequate knowledge. The mean paired difference in knowledge score was -18.8 with t-value=-22.7 with p-value less than 0.0001 indicates that Nutritional counseling was effective in enhancing knowledge among COPD patients. The mean pretest knowledge score was 6.12 and mean post score was 24.8 and the difference in knowledge score was 18.8 with percentage improvement in knowledge was 75.8.Hence Nutritional counselling among COPD patients was effective in enhancing their knowledge. Conclusion: The study was concluded that, there was a significant improvement obtained following Nutritional counselling on Nutritional counseling. The study was recommended that there is an immense need for educational programme in areas to improve the knowledge of COPD Patients regarding Nutritional counseling.