INTRODUCTION: In light of the foregoing, the investigator determined that it was essential to assess BLS knowledge among undergraduate students, as well as to update knowledge and develop ability. CPR practice is the best way to learn BLS. Educating students and raising awareness about BLS will help them learn more about it and avoid death due to cardiac arrest. CPR should be started as soon as possible to increase the chances of a good resuscitation and survival. AIM OF THE STUDY: Assess the knowledge regarding basic Life support among students at nursing colleges MATERIAL AND METHOD: A descriptive study was carried out on 200 nursing students of Government College of Nursing Jodhpur. Samples were selected by using Non Probability Purposive Sampling Technique. Data was collected using structured knowledge questionnaire and analyzed by using descriptive and inferential statistics. RESULT: The findings of the study reveals that 61.50% Nursing students had average knowledge, 26% had poor knowledge and 12.50% had good knowledge regarding basic life support However all the demographic variables such as age, gender, place of residence, academic level, history of receiving any first aid training, assisting, witnessing or providing BLS were found to have significant association with the level of knowledge regarding basic life support. The study results showed that the nursing students have average knowledge regarding basic life support. CONCLUSION: It can be reiterated that nursing students have average knowledge regarding basic life support as per current research recommendations. They require simulated practices and Role play to enhance their knowledge and awareness regarding basic life support.