The current study aimed to identify the level of administrative creativity among the principals of post-basic education schools in the Governorate of Al Dakhiliyah, Sultanate of Oman, and its relationship to the professional motivation of teachers. To achieve the objectives of the study, the descriptive correlative approach and the questionnaire was used as a tool for the study. A questionnaire consisting of (59) items was developed, divided into two parts, and applied to the study sample, of (274) post-basic education schools' teachers in Al Dakhiliyah Governorate, Sultanate of Oman. Among the most important study's findings is the level of administrative creativity among the principals of post-basic education schools in the Governorate of Al Dakhiliyah, Sultanate of Oman from the teachers' point of view, was high. The study also revealed that there were no statistically significant differences in the study sample's individuals estimates of the level of administrative creativity among the principals of post-basic education schools in the Governorate of Al Dakhiliyah, Sultanate of Oman due to the study variables (educational qualification, years work experience), the presence of statistically significant differences attributed to the gender variable, in all fields of administrative creativity and for the benefit of females. The findings of the study also revealed that the level of professional motivation among teachers at post-basic education schools in Al Dakhiliyah Governorate, Sultanate of Oman was high and also that there were statistically significant differences in the study sample's individuals estimates of the level of professional motivation among the principals of post-basic education schools in Al Dakhiliyah Governorate, Sultanate of Oman due to the study variables (gender, educational qualification, and years of work experience). The study also revealed the existence of a direct correlation between the level of administrative creativity among the principals of post-basic education schools and the level of professional motivation among the teachers of such schools in Al Dakhiliyah Governorate, Sultanate of Oman. In light of the study findings, a set of recommendations were provided, the most important of which are: The necessity of considering upon nomination for the position of school principal, choosing school principals who possess creative leadership skills and are distinguished by the traits of a creative personality, enrolling such individuals in courses and training programs that help adopt administrative creativity as an idea and an approach in their schools, granting sufficient authority to implement regulations, instructions and systems according to a purposeful and constructive vision, the need to pay more attention to the system of incentives and rewards for teachers, giving the utmost importance in order to increase their professional motivation, provide special courses and programs to develop the skills and capabilities of creative teachers, support them with enrichment programs that raise their creative abilities and develop them for the better.