The aim of this study is to develop a Disciplined Mind Scale (DMS) in order to determine the disciplined mind features of 4th grade students. Considering that students around the age of 11 can have some scientific thinking skills, it is thought that the disciplined mind features of 4th grade students should be determined. The sample of this research, in which the survey method was used, consists of 400 students studying in Afyonkarahisar-Turkey, in the 2018-2019 academic year. 23 items were removed from the item pool consisting of 50 items and a final form of 27 items, 7 negative and 20 positive, was obtained. KMO (Kaiser-Meyer Olkin) value was calculated as 0.862 and Cronbach alpha value as 0.826. As a result of the factor analysis, it was seen that the factor loading values of the items were between 0.426 and 0.786. It was determined that the scale consists of 5 factors (thinking like a scientist, making interdisciplinary connections, motivation to live with discipline, deep learning, connection with daily life). As a result of validity and reliability analyzes, it was seen that it can be accepted as a valid and reliable measurement tool consisting of 5 sub-dimensions that measures disciplined mind traits of 4th grade students.