Objective: Multidisciplinary management is very important component of treatment of cancer. Multidisciplinary tumor boards (MTBs) provide the chance for shared-decision making in this complex type of disease. The participation of patients or caregivers in MTBs is a contentious issue and is not common in Turkiye. In this study we aimed to determine what Turkish physicians participating MTBs in Selcuk University Faculty of Medicine think about the participation of patients and caregivers in MTBs. Method: The study was conducted in Selcuk University Faculty of Medicine in August 2022. The physicians that accepted to participate completed a 9-item questionnaire. The relationships between the participants’ sociodemographic characteristics and their questionnaire responses concerning MTBs were analyzed using Pearson’s chi-square test or the Fisher-Freeman-Halton test. Results: No statistically significant correlation was found between the socio-demographic characteristics of the participants and the opinions of cancer patients or their relatives about their participation in multidisciplinary tumor boards. 50 % of the participants do not approve participation of patient or caregivers in MTBs. 35 % of participants approved the participation of both in the MTBs. 4.4 % of participants approved only the participation of caregivers whereas only the 8.9 % of medical oncologist approved only the participation of patients in tumor board. Conclusion: Among 45 Turkish physicians in a tertiary care center, half of the participants did not approve of the participation of patients or caregivers in MTBs. The major reason for this lack of approval was the fear that patients and caregivers would not understand medical terminology which might lead to misunderstanding by patients or caregivers.