Aims:The purpose of this study was to demonstrate the factors influencing nurse-patient communication in cancer care in Iran.Materials and Methods:This study was conducted with a qualitative conventional content analysis approach in oncology wards of hospitals in Tabriz. Data was collected through purposive sampling by semi-structured deep interviews with nine patients, three family members and five nurses and analyzed simultaneously. Robustness of data analysis was evaluated by the participants and external control.Results:The main theme of the research emerged as “three-factor effects” that demonstrates all the factors related to the patient, nurse, and the organization and includes three categories of “Patient as the center of communication”, “Nurse as a human factor”, and “Organizational structures”. The first category consists of two sub-categories of “Imposed changes by the disease” and the “patient's particular characteristics”. The second category includes sub-categories of “sense of vulnerability” and “perception of professional self: Pre-requisite of patient-centered communication”. The third category consists of the sub-categories of “workload and time imbalance”, “lack of supervision”, and “impose duties in context of neglecting nurse and patient needs”. Characteristics of the patients, nurses, and care environment seemed to be the influential factors on the communication.Conclusions:In order to communicate with cancer patients effectively, changes in philosophy and culture of the care environment are essential. Nurses must receive proper trainings which meet their needs and which focus on holistic and patient-centered approach.