INTRODUCTION: Cardiopulmonary resuscitation of children is a medical-technical procedure with the specific goal of maintaining life. It represents a dynamic response if a child has a cardiac arrest. If a cardiac arrest occurs, resuscitation should be started as early as possible to prevent damage to the neurological status. An automated external defibrillator (AVD) is a device used in advanced life support and is used to deliver a rapid electrical shock to restart the heart. OBJECTIVE OF THE RESEARCH: To examine whether there is a difference in knowledge between full-time and part-time students of the undergraduate professional study of Nursing about cardiopulmonary resuscitation of children. Also to examine whether there is a difference in attitudes between full-time and part-time students of the undergraduate professional study of Nursing about cardiopulmonary resuscitation of children. MATERIALS AND METHODS: The research was conducted at the Faculty of Health Studies in Rijeka, with full-time and part-time undergraduate professional nursing students. The research sample was students of the first, second and third year of study, both genders were included. A total of 152 respondents participated in the research. The desired data was collected through an online questionnaire, and the research was completely anonymous. After the research, the collected data were statistically processed using the Microsoft Excel computer program. The collected data were analyzed and processed using statistical methods. RESULTS: The results of the research showed that part-time students on average had better results than regular students on knowledge test questions, and the results also showed that part-time students on average have more positive attitudes about cardiopulmonary resuscitation of children than regular students. It can be concluded that when it comes to knowledge, full-time and part-time students show a satisfactory level of knowledge, but when it comes to attitudes, part-time students show that they are more skilled and mentally prepared to provide cardiopulmonary resuscitation. CONCLUSION: Cardiopulmonary resuscitation of children is a very psychologically and physically demanding medical-technical procedure, because it requires great concentration, composure, calmness in a crisis situation. Knowledge needs to be constantly improved and upgraded in order to make it better and more excellent, but you also need to work on skills on which this knowledge will be used