Purpose: This study was done to identify types of subjective perception of their disease by adolescents who have insulin dependent diabetes mellitus (IDDM) in order to better understand these adolescents and to determine effective nursing interventions. Method: Q-methodology was used in this study. The 36 Q-statements were selected through a literature review and in-depth interviews with participants. Data were collected from a 33 P-sample by sorting the 36 Q-statements into a 9 point standard. The data were analyzed using the PC QUANL program. Results: Five types of perception were identified: Type 1 being a recipient and having a will to cope with the disease, Type 2, seeking support from others, Type 3, emotional and negative coping, Type 4, pursuing own beliefs but with conflict at the same time, and Type 5 feeling under heavy pressure as their condition made them feel insecure, and they felt sorry to their families. Conclusion: The findings of the study are expected to contribute to improving clinical practices by helping nurses have a broader understanding of adolescents with IDDM, and exploring ideal nursing interventions.