Total Quality Management (TQM) takes the main role to establish the quality in educational system. It was found that most of the higher secondary schools in Namakkal District, Tamil Nadu, India did not have any concrete mechanism to assess and ensure their quality. The quality of schools was determined through examination results only i.e., outcome-based assessment. Of 963 Teachers of the schools as population of the study, 96 teachers from Government, Government-aided and Self-financing schools were selected as sample through "Random Sampling" technique. The tool Teacher's Institutional Attitude Scale (TIAS) was constructed and standardised. Survey method was followed. To analyse the data, the statistical techniques such as mean, standard deviation and t-test were used. The result showed that there was significant difference between teachers of male and female; rural and urban; govt aided and self-financing schools; govt and self-financing schools; and 0–5 years and >10 years’ experience on TQM. There was no significant difference between teachers of govt and govt-aided schools; 0–5 years and 6–10 years’ experience; and 6–10 years and >10 years’ experience with regard to attitude on TQM. The present study recommends that teachers be used for planning and administration in schools; internal quality assurance cell be formed in schools; and national assessment and accreditation body be established. In this way, the present study got importance to analyse the application of principles of TQM in higher secondary schools at Namakkal district, Tamil Nadu.