The research explores the lived experience of unmarried women who accepted induced abortion during the first trimester. The research was conducted by phenomenological research and took 10 unmarried women as study samples. The researcher took care of these cases from the beginning to the end of the operation and recorded the process of the abortion. Data was collected by 3 times in-depth interviews after abortion. The contents of interviews were analysed in accordance with Colaizzi’s theory (1978). The results show that the lived experience could be divided into 7 themes, including “shock and not knowing what to do about the pregnancy”, “confusion and conflict in deciding whether to have an abortion or not”, “loss and depression after making the decision”, “fear and worry when facing the operation”, “relief and grief after the abortion”, “worry about the recovery”, and “mitigating personal sense of guilt by self-persuasion in a religious way”. The result of this study can be applied as a reference for clinical nursing staff and nursing administrators.