The purpose of this research is to develop a valid and reliable "Innovative School Leadership Scale" and examine the innovation level of school principals. Within the scope of the research, an "Innovative School Leadership Scale" with 28 items was developed. In the trial application, 197 teachers were reached, and 523 teachers in the main application. Exploratory factor analysis and confirmatory factor analysis were performed to determine the construct validity, and Cronbach's alpha coefficient was calculated to test the reliability. The measurement tool, a one-dimensional scale with 28 items, was found to be valid and reliable (=0.989). Teachers of different gender, age and marital status have similar views on innovative school leadership. Teachers have more positive attitudes than teachers with a master's degree. It is stated that the developed scale can be used by researchers.