Background: Supervision is one of the techniques used to improve nurses’ competencies as; it provides essential support for
nurses progressing into advanced practice to foster professional development, and career adaptability. Aim: The present
study aimed to evaluate the effect of educational program about clinical supervision for first line managers on staff nurses'
career adaptability. Research Design: Quasi experimental design was utilized. Study Setting: the study was conducted in all
units at Benha University Hospital, the total number of the studied units were (57) units. The study sample was: All the
available head nurses and their assistants (88), and convenient sample of staff nurses (176) who are working in the abovementioned
study setting. Tools of data collection: Three tools were used: (1) Clinical Supervision Knowledge Questionnaire,
(2) Observational checklist of first line managers' performance, and (3) Career Adapt-Abilities Scale (CAAS). Results: The
findings of this study showed that there was a highly statistical significant improvement in first line managers' knowledge
and performance regarding clinical supervision thorough program. Moreover, there was a highly statistical significant
improvement in staff nurses' level of career adaptability. Conclusion: The study concluded that there was a highly statistical
positive correlation between first line managers' clinical supervision performance and staff nurses' career adaptability.
Recommendations: Setting clear responsibilities for both nursing supervisor and supervisee through a constructive clinical
supervision policies and procedures, providing supportive healthy work environment that help nurses to reflect on their
personal and professional work-related issues with their clinical supervisors that help in enhancing their career adaptability,
and integrating career adaptability in nursing education.