---

Background: Living with a parent having cancer would be intolerable for their children. Adolescents usually encounter much more emotional problems than others and will be especially more affected during the period of passage from childhood to adolescence. Regarding the fact that these affects are varied depending on their family structure and culture, researchers decided to investigate the main problems of adolescents had a parent with cancer in Iran.
Materials and methods: This qualitative research with descriptive– explorative design was done on 27 participants. Semi-structured interviews were used for gathering data and constant comparative analysis method was used for analyzing.
 Results: The main problems of adolescents who had parents with cancer were in seven themes, and among them psychological problems had the most codes, and in the theme of adolescent made of crystal we have described it in details.
Conclusion: Psychological problems of adolescents having parents with cancer in Iran are the same as other countries with this difference that in Iran, we do not have educational- supportive program for reducing these problems therefore necessary steps should be taken for preparing and implementing this program.
Keywords: Cancer, Adolescent, Parent Life, Qualitative research.