Background: More complexity, unpredictable outcomes, and the need to continuously manage friction between two or more seemingly opposing but interdependent ideals characterize the majority of leadership difficulties. Recognizing polarities and the importance of each pole to their solutions is something that leaders should do. Aim: To evaluate the effectiveness of the polarity training program on nurse managers' performance. Subject and methods: Design: A quasi-experimental design was utilized to conduct this study. Setting: This study was conducted at Kafr El-Dawar General Hospital which is affiliated with the Ministry of Health and Population (MOHP). Sample: A convenience sampling technique included the study subjects all head nurses and their assistants working in all the previously mentioned settings (n=42). Three tools were used throughout the study phases. Tool (I): Nurse Managers' knowledge about polarity management Questionnaire classified into two parts; Part 1: personal data sheet, Part 2: Nurses' knowledge regarding polarity management and polarity map application test. Tool (II): Polarity management practice checklist, and Tool III: Polarity Map Evaluation Observational Checklist. Results: Before participating in a polarity training program, the majority of nurse managers had low levels of practice and poor levels of knowledge in polarity management. The post-implementation polarity training program knowledge and behaviors of nurse managers about polarity management showed a significant improvement over pre-implementation in all items and the overall score. The knowledge and practices of nurse managers regarding polarity are positively enhanced by the polarity training program, in conclusion. It is suggested that orientation programs for recently appointed managers should incorporate polarity management awareness and that nursing managers' performance reviews should incorporate polarity management. Additionally, polarity management should be covered in the nursing administration course curriculum at Egyptian nursing faculties.