The Aim of the study was to investigate the relationship between head nurses' job performance and staff nurses' commitment. A descriptive correlational research design was used. Settings: all inpatient units at Sherbin general hospital, the hospital affiliated to Ministry of Health at Dakahlia Governorate, Egypt.  The subjects of this study included two groups; 25 head nurses and 203 staff nurse with at least one year of experience. Tools of data collection included:performance evaluation observation sheet and organizational commitment scale were used to collect the date of the study.                                                                                                           Results:head nurses had average level of job performance and majority of staff nurses were committed,   it was found correlation between organizational commitment of staff nurses and job performance of head nurses. Based on the study results, it was recommended that enhance head nurse job performance through: develop and implement training program on job performance as a managerial skill for head nurses to continues improvement in areas patient care. Integrate job performance courses into the nursing curriculum to increase nurses' level of job performance. Conclusion: All head nurses had average level of job performance and the most job performance head nurses behavior pertained to unit management followed by patient care management and their staff nurses were highly committed. Staff nurses are more committed in Supervisor-related internalization followed by Supervisor-related identification, Organizational identification and Organizational internalization.