Background: Effective communication is essential to the interpersonal relationship between supervisors and subordinates in the workplace. In order for supervisors to be perceived as competent communicators, they must share and respond to information in a timely manner, and communicate clearly and concisely to subordinates and clarify work tasks which may contribute to communication satisfaction. Additionally, when employees experience more positive communication relationships, they also experience more positive job satisfaction. Aim of the study: To assess the relationship between nurse supervisors' communicative behaviors and subordinates' communication satisfaction, job satisfaction and willingness to collaborate. Subjects and Methods: Research design: A descriptive correlational study design was used. Setting: This study was conducted at Zagazig University Hospitals. Subjects: Stratified random sample of 366 nurses working at Zagazig University Hospitals. Tools of data collection: Five tools were used in data collection namely: Communicator competence instrument, nonverbal immediacy scale, interpersonal communication satisfaction inventory, abridged job in general scale, and decision making collaboration scale. Results: Findings revealed that the highest mean percent score was for supervisors' nonverbal immediacy while the lowest was for supervisors' communication competence .There was a significant correlation between supervisors' communicative behaviors and nurses' communication satisfaction. However, there was no significant correlation between supervisors' communicative behaviors and nurses' job satisfaction. As well, there was a statistically significant positive correlation between supervisors' communication competence and nurses' willingness to collaborate in decision making. Conclusion: Nurse supervisors' communication competence and nonverbal immediacy were good predictors of nurses' communication satisfaction, while they weren't as regards nurses' job satisfaction. Additionally, nurse supervisors' communication competence was a strong predictor of nurses' willingness to collaborate in decision making, while nurses supervisors' nonverbal immediacy wasn't. Recommendations: Hospitals' administrators should develop training programs for nurse supervisors to enhance their communication competence. Additionally, nurse supervisors should encourage nurses to participate in the decision making process.