Ecological citizenship is a type of citizenship that encourages individuals, communities and organizations as citizens of the world to consider environmental rights and responsibilities. When the literature is examined, it is seen that there are four most emphasized dimensions of ecological citizenship. These are responsibility, sustainability, rights and justice and participation. It is only possible to raise people as ecological citizen by educational activities. For this reason, measuring of the level of teachers' ecological citizenship is crucial. It is also found that there is no scale aiming to assess the level of teachers' ecological citizenship, so the goal of this study is determined to develop a scale measuring the ecological citizenship of teacher candidates. After analyzing the related studies and literature in this field, a trial form of the scale was developed with 53 items which are graded as 5 point Likert Scale. After the development of the scale, it was presented to the experts' opinions to analyze the content and face validity of the scale, and according to the experts' ideas, nine items were discarded from the scale. In order to gather evidence for the validity and reliability of the scale, the scale form of 44 items was applied to a total of 532 teacher candidates who were studying in different branches in the 2016-2017 Education Year Spring Semester. As for item analysis, the item total correlations were calculated and item analysis based on the lower and upper 27% group was performed. In order to investigate the structural validity of the scale, Exploratory and Confirmatory Factor Analysis were performed. As a result of these analyzes, a final scale with a 4-factor structure consisting of 24 items and accounting for 49.811% of the total variance has been reached. These factors have been named as Participation, Sustainability, Responsibility, Right and Justice. In the Confirmatory Factor Analysis of the Ecological Citizenship Scale, it has been found that the proposed model has been verified and the model-data fit is perfect level. For the reliability of the scale, the Cronbach-Alpha Internal Consistency Coefficient was calculated for the whole scale and according to the factors. According to this, the Cronbach-Alpha Internal Consistency Coefficient for the whole scale was found as 0.901. The coefficients as for factors were estimated like that: 0.865 for Participation, 0.762 for Sustainability, 0.745 for Responsibility and 0.636 for Rights and Justice. All these findings have showed that the Ecological Citizenship Scale is a valid and reliable scale for the teacher candidates.