Cardiac arrest in pregnancy is one of the most difficult clinical situations. Although most features of resuscitating a pregnant woman are similar to standard adult resuscitation, several aspects and considerations are different. The most clearly difference is that there are 2 patients, mother as well as the fetus. The management of cardiac arrest in the pregnancy is considering a skill full task in emergency department as well as in delivery room, a nurse should be skill full and expert to perform Cardio Pulmonary Resuscitation on pregnant women following general advanced cardiac life support guideline. A pre-experimental study was conducted in September 2021 in selected hospitals of Shimla. One group pre-test post-test design was used for the study. Total 60 nursing personnel working in selected hospitals of Shimla (H.P.) were selected by using convenience sampling technique. A self-structured knowledge questionnaire was used to assess the Knowledge regarding cardiopulmonary resuscitation in pregnant women. The study finding showed that the mean post test knowledge score (22.1) was higher than the mean pre test knowledge score (15.03) which were statistically significant. It was concluded that the video assisted teaching was effective in increasing the knowledge of registered nurses regarding cardiopulmonary resuscitation in pregnant women.