Introduction:
Considering that patients in the special units have critical conditions and require the best possible specialized care, having appropriate professional relationship in these units is of great importance. Taking care of patients under critical conditions requires occupational safety and sense of satisfaction in the nurses. Indeed, nursing managers should provide an appropriate organizational environment with emphasis on establishing an effective relationship.

Aim and objective:
Explaining nurses’ perception of professional relationship in the coronary care unit.

Materials and methods:
The present study was a qualitative study conducted through conventional content analysis method. The participants were 37 nurses working in the coronary care unit who were selected purposively. Data were gathered through 25 in-depth interviews and 3 focus groups

Results:
After analyzing the data, the main theme of “ineffective relationship between the senior managers, head nurses, and the personnel of the coronary care unit” and two subthemes of “ineffective relationship between the head nurse and the personnel and “ineffective organizational environment” were extracted.

Conclusions:
The results of the present study provided an image of real experiences of participating nurses about the relationships that exist between different levels of nursing profession. so, by establishing a professional relationship in the coronary care unit, specialized cares would be performed. The main theme obtained in the study, “ineffective relationship between the managers, head nurses, and personnel of the coronary care unit” suggested different aspects of the outcomes of ineffective relationship between nurses, head nurses, and nursing managers. Therefore, it is necessary that professional relationships be improved at different levels of nursing and emphasized seriously.