Blended learning is one of the recently formulated innovative learning techniques that involve both e-learning procedures and the traditional learning methodologies in the teaching learning process. It is also known as technology-mediated instruction or mixed-mode of instruction. Blended learning requires the physical presence of both the teacher and the student with some elements of student control over time, place, path or pace. While students still attend the traditional talk and chalk methods of instruction in the classroom with the teacher’s presence, the face-to-face classroom practices are combined with computer-mediated activities regarding content and delivery. This blended learning pedagogy has been proved very useful in the digital age where learners are separated by a distance in the teaching-learning process. The present study is intended to explore the factors that affect the attitude of teachers towards Blended learning in improving student performance in secondary schools in relation to the demographic variables, viz., gender, designation, teaching experience and the medium of instruction offered by the school. The study followed descriptive method of research. The sample consisting of 400 teachers (40 Headmasters and 360 School Assistants) from 40 secondary schools in Visakhapatnam district has been selected using Stratified Random Sampling method. The data were collected using a questionnaire developed and standardized by the researchers. The data were analyzed using different statistical techniques like means, standard deviations and t-tests. The findings of the study revealed that the variables - gender, designation and the medium of instruction offered by the school have no influence on the perceptions of teachers towards the use of Blended learning in improving student performance in secondary schools. However, teaching experience has a positive influence on the teachers’ attitude towards blended learning. The study suggested that the teachers should have positive attitude towards blended learning