Nursing students face not only academic stress but stress at work during their training period. Aim: The study aims to assess the level of perceived stress among fourth year B.Sc. Nursing students during their Maternity Nursing clinical posting. Methods:The descriptive study was conducted among seventy fourth year B.Sc. Nursing students of Westfort College of Nursing, Thrissur. Perceived Stress Scale was used to collect data from the students at the end of one week of their clinical posting. Results: Among the seventy students, 31.43% were having low level of stress, 61.43% were having moderate level of stress and 7.14% were having severe level of stress. The factors showed that stress from teachers and nursing staff was the highest stress factor. Conclusion: Measures should be taken to reduce the level of stress among nursing students during their clinical posting.