The aim of this study is to examine the relationship between teachers' self-efficacy perception on ICT and their attitude to ICT usage in the classroom. For this purpose, two scales were used: 'Teachers' Self-efficacy Perception on ICT Scale' and the 'Teachers' Attitude towards ICT Usage Scale'. A total of 42,307 teachers took part in this study. Mean, standard deviation, Pearson correlation and linear regression analyses were used to analyse the collected data. A significant relationship was found between teachers' self-efficacy perception on ICT and their attitude towards ICT usage in their classrooms. According to the findings, it can be said that if teachers' self-efficacy level is high, teachers can use ICT in the learning process effectively and they can develop themselves in ICT use. Moreover, they can improve class management while using ICT. [Paper presented at the World Conference on Education Science (10th, Prague, Czech Republic, Feb 1-3, 2018).]