Due to their important roles in organizational performance, internal marketing and organizational citizenship behavior have become more interesting subjects among researchers and practitioners. The purpose of this study: Was to assess the relationship between organizational citizenship behavior and internal marketing of nursing profession. Research design: A descriptive correlational research design was utilized. Setting: The study was conducted at Menoufia University Hospitals at Shebin El- Kom. Sample: systematic random sample of 400 staff nursing was included in the study. Instruments: Two instruments were used to collect data. First instrument: Internal marketing questionnaire .Second instrument: Organizational Citizenship behavior Scale. Results: Nearly two thirds (63.3%) of the staff nurses had high level of total organizational citizenship behaviors, 57.2% of staff nurses reported high level of internal marketing. There was a significant positive correlation between organizational citizenship behaviors and internal marketing of nursing profession. Recommendation: Menoufia University hospitals should provide more care to internal marketing activities, and direct more organizations' resources and capabilities towards benefiting their employee as much as possible and encourage tools that increase the citizenship behavior.