Overall, nursing training is a stressful process. Especially when second year nursing students are evaluated within the professional socialization theory, they are stated to be affected by these sources of stress more negatively. This research was carried out in order to determine the stress sources of second year nursing students. 15 nursing second year students were included in the research by using the maximum variety sampling. The data were collected by depth interview method. Inductive content analysis method was used to analyze the data. As a result of the interviews four main categories which were clinical practice, theoretical training, social, and personal lives, and themes and sub themes related to these were identified. Six themes regarding the clinical practice were identified. These themes were sources of stress from the trainer, therapist, nurses, patients, student's own, and practice. The themes under the theoretical training category were stress sources experienced with trainer, student, and other students and under the social life category were accommodation, university life and family attitude and lastly, under the personal life are under self-confidence, not being able to control the emotions, time management, and opinion mistakes. As a result, it was found out that the stress sources of students were both internal and external. It is recommended to organize programs to help students become stronger.