Background: The internship year is a highly stressful period for nursing students because they face many challenges in clinical settings as the gap between theoretical and practical knowledge, have to deal with sophisticated and specialized patients, lack of support from health care providers. All of these factors leading to reality shock experience for them.  Aim:  The study aimed to investigate the relationship between reality shock and career resilience among nursing interns students. Design: Descriptive correlational research design was designed. Subjects and methods: Study sample: convenient sample composed of 206 nursing intern's students setting: Mansoura university hospital during the academic year 2020-2021. Tool: The tools used to collect data for this study were self-administered questionnaire which divided into two tools. Tool (1): consisted of two parts: part one: personal and job characteristics for the participants. Part two: reality shock questionnaire. Tool (2): career resilience questionnaire. Results: two thirds of nursing interns students perceived career resilience as moderate and the total mean score was 111.37±13.87. The highest percent of the studied nursing interns students had a moderate level toward reality shock with total mean score 41.66±6.18.Conclusion: There was statistical positive correlation between reality shock and career resilience. As well, there is significant correlation between reality shock and four domains of career resilience (belief in oneself, own success ethic ,self-reliance ,receptivity to change).Recommendations: It is recommended that nursing managers should maintain close supervision that provides nursing intern's students for at least 3 months , Nursing faculty should conduct periodic evaluation and feedback of the content and length of training, Providing undergraduate student with the information and realistic situations to avoid reality shock.