A descriptive study was conducted for a period of four weeks. The data for knowledge on pulmonary rehabilitation were analyzed and tabulated. The findings showed that 50 (83.3%) patients have in-adequate knowledge; 10 (16.7%) patients have moderate knowledge and none of the patients have adequate knowledge. There is a significant association between the knowledge and the demographic variables of education and marital status. There is no association with respect to other demographic variables. Based on the objectives of this study, the level of knowledge score on patients with chronic respiratory disease shows that 50 (83.3%) patients have in-adequate knowledge; 10 (16.7%) patients have moderate knowledge and none of the patients have adequate knowledge. There is significant association between the knowledge and the demographic variables of education, and marital status. There is no association with respect to other demographic variables. These types of associations are statistically significant and it was calculated using Pearson chi square test. The major findings drawn from the study are, the majority of people have inadequate knowledge and none of the have adequate knowledge There is no association between the knowledge and selected demographic variables except the educational qualification and marital status (P=0.003). The majority of illness identified is Chronic obstructive pulmonary disease.