Air pollution is a great problem of present scenario, which has serious harmful impact on human health & environment. Air pollution is considered as the major environmental risk factor in the incidence and progression of different morbidities such as asthma, COPD, lung cancer. Traffic police by their profession doing well for our society. They are vulnerable people to developed morbidities related air pollution. Aims and objectives: To assess Knowledge gap regarding morbidities, its preventive, control measures and existing morbidities related to air pollution among Traffic police in W.B (Kolkata) and to examine the association of knowledge gap with morbidities and other selected variables. Materials & Methods: A descriptive study was conducted “Assess knowledge gap on morbidities, its preventive, control measures and existing morbidities related to air pollution among Traffic police in W.B (Kolkata). Conceptual frame work of the study was based on Pender’s health promotional model. Study was done with 200 Traffic Police under different Kolkata traffic guard, W.B. sample selection was done by probability sampling technique through lottery method. Data regarding knowledge were collected through structured questionnaire. Results: Descriptive and inferential statistics were used for data analysis. Study findings revealed that 62%( 124/200) traffic police obtained average knowledge score, only 3%(6/200) traffic police obtained High knowledge score. There is significant association between knowledge score in relation with year of service as obtained value 2.98 is greater than the tabular value at 0.05 levels 1.98. Among 200 traffic Police , 33%(66/200) Traffic Police developed respiratory morbidity,27%(54/200) developed Eye morbidities,20.5%( 41/200) developed Skin morbidities. There is significant association between the Respiratory morbidity (yes) / (no) with the more than 5 years /less than 5 years of service done in exposure of air pollution .The value of χ² obtained in this case was 18.897 which was greater than the values required for χ² to be significant at 0.05 and 0.01 levels of significance i.e. 12.592 and 16.812 respectively at df 6. Conclusion: It has implication on control and prevention of occupational health hazards. Based on the study findings information booklet to be developed for their knowledge and practice of preventive measures during their working period so that they can prevent their morbidities.