Teaching aptitude is a condition or set of characteristics that estimates the extent to which the individual will profit from the specified course of training, or forecast the quality of his/her achievement in a new situation. Teacher education and teaching aptitudes are intricately related to students’ learning outcomes. Today’s students become tomorrow’s teachers. Today’s teachings develop teaching aptitudes, and generate learning outcomes. The main objective of the study to compare the teaching aptitude of male and female pre-service teachers of government and private Elementary Teacher Training Institutes of Haryana. The sample of the study consisted of 200 elementary teacher trainees (100 male and 100 female) studying in government and private elementary teacher trainees of Eastern Haryana. The Result of the Study : There exists no significant difference in Teaching Aptitude Scores of pre-service teachers of government and private Elementary Teacher Training Institutes of Haryana and no significant difference in Teaching Aptitude Scores of male and female pre-service teachers of Elementary Teacher Training Institute of Haryana.