Objective: Family caregivers (FCs) of cancer patients are frequently seen as a barrier to honest communication with patients in Egypt. This study was conducted to investigate the attitude of FCs of cancer patients toward cancer diagnosis disclosure (CDD) and its determinants.; Methods: A structured interview was used to assess the preferences of 288 FCs regarding CDD.; Results: According to the FCs, 85% of patients were aware of their diagnosis. The majority (81%) of FCs preferred CDD to patients.