Background: Healthy diet is one of the most important matters in Diabetes and the patients themselves have the main role in this area.

  In interventional trainings in Iran, the patients with diabetes are less entered into training programs. Therefore, the aim of this study is to investigate the effect of teaching based collaborative care model on diet of patients with Diabetes type II.

  Methods: This study is a single-blinded randomized clinical trial which was done in Educational Center of Diabetes of Tabriz. The sample consisted of 40 patients with diabetes who were randomly divided into two groups of experimental (20 patients) and control (20 patients). At first, the patients took the pre-test and then collaborative testing was held for seven one-hour sessions for the experimental group including the stages of motivation, preparation, engagement and evaluation. Also, three months after the collaborative program, patients of both groups took a post-test. Life Style Questionnaire (LSQ) was used for collecting data. The data were entered into SPSS13 and analyzed by descriptive and inferential statistics.

  Result: The results of the study showed that after performing the intervention, the patients of the experimental group reported better performance in compare with control group in items related to using snacks between main meals (p= 0.05), liquid fats(0.01), animal fat and butter(p=0.04), fruit(p=0.001), vegetables(p=0.03), fish(0.02).

  Conclusion: According to the results, it is recommended to use collaborative care model for training Diabetes type II.