The study was designed to explore the effect of TIMSS framework in identification of leadership traits of the students which are directly related to the cognitive domain given in TIMSS assessment framework. The study was Ex-post facto in nature. Population for the study was all the students of grade 4. The sample was collected through convenient sampling technique and the researcher selected students of grade 4 of private schools of Lahore. The researcher conducted 2 tests. 1 of Mathematics and 2nd of Science. After getting the test result the researcher gave a questionnaire related to the leadership traits to the same sample and then analyzed its results. The research has shown that the TIMSS (Trends in International Mathematics and Science Study) is helpful in identification of leadership traits of students. The correlation was applied. The results show positive correlation in knowledge domain, moderate positive correlation in reasoning and strongly positive correlation in application domain and leadership traits.