The present study is an attempt to examine the teacher effectiveness and occupational stress of secondary school teachers of Haryana. For this study, a sample of 120 secondary school teachers working in different government and private schools of Bhiwani district of Haryana were taken. The teachers included in the sample ranged in 30 to 55 years of age with the mean age of 42.5 years. Teacher Effectiveness Scale and Occupational Stress Scale were administered on all the selected subjects. The data thus obtained were analyzed by using t- ratio and Pearson Product Moment Method of Correlation. The obtained findings reveal that government secondary school teachers and male secondary school teachers obtained higher mean scores on the measure of teacher effectiveness. In case of occupational stress private secondary school teachers and female secondary school teachers obtained significantly higher mean scores. Negative correlation was also observed between teacher effectiveness and occupational stress.