Introduction: The health care providers, patients and their relatives often face to the conditions and unpleasant circumstances such as bad news. Our purpose of this study was to explore the nurses' experiences of breaking bad news to the patients and their relatives.Method: In this qualitative research, semi-structured interviews conducted with 30 nurses. The sampling method was purposeful and with maximum variation. All of the participants answered at least to one open-ended question "have you ever told a bad news to your patients or their relatives? If so, explain your experiences" The probing questions used to make deeper interviews. All of the interviews were recorded, transcribed verbatim and analyzed using "conventional content analysis" method. The oral informed consent was obtained for the participation in the study and voice recording.Results: our analysis showed that "avoiding and delegating to the physician, seeking help from distant relatives, providing a context, minimizing the importance of situation" are main themes for the nurse’s experiences with breaking bad news. The participants believed that giving diagnostic bad news is not their responsibility, hence, tried to delegate giving bad news to the physicians. One of the most common strategies for giving bad news was "give hope to the patients and their attendants" Conclusion: The nurses used the uncertain procedures to give bad news to the patients and their relatives, because as their idea, physicians are responsible. So, since there was no protocol or guideline for breaking bad news to apply in practice, the participants used their own personal and cultural based styles. With consideration of social and cultural differences among the patients, and high frequency of this working experience for the nurses, learning the ethical ways of giving bad news seems very essential.