The educational system of a nation is the true indicator of its strength, its quality of life and well being of its citizens and its potential to find its place in the world. If you want you take a nation to great heights, you have to have an excellent educational system. Teacher effectiveness is considered as the degree to which a teacher achieves the desired effects upon his/her students. It is the capacity of a teacher to possess the requisite knowledge and skills as well as the effect on the students as the level of learning been done by both of them in a given time period to reach as the level understood by the students from the teacher. Objective: The present study was conducted to investigate the relationship between personality and teacher effectiveness. Simple random sampling method was applied for the present study. Single static group design has been used. A sample of 60 teacher educators male and female teaching in B.Ed. & M.Ed. Colleges of Ghaziabad District were selected randomly. Simple random sampling method has been used. To draw the inferences: Teacher Effectiveness developed by Shallu Puri and S.C.Gakkar - Personality Assessment Profile was used. The reliability was found as 0.91 and Validity as .95. Result: The findings reveal that there was a significant and positive relationship between Sattvic personality of teachers and their teaching effectiveness. No significant relationship was found between Sattwic, Rajasic & Tamsic personality of teachers and their Teaching Effectiveness.