To train qualified teachers, it is important to use methods that employ theory and practice together in teacher training. For microteaching to be more effective, supporting it with online environments is essential. This study aims to find out the effects of social network-supported microteaching (SNSM) on self-efficacy and teaching skills of pre-service teachers. The study was conducted using mixed research model. The participants of the research are 17 pre-service teachers from the Department of Computer Education and Instructional Technology. The SNSM process took place in two stages. Firstly, Pre-service teachers were asked to respond to Teacher Self-efficacy Scale prior to SNSM. Then, the open-ended interview questionnaire and opinions of the pre-service teachers were received and the data on the effect of SNSM on teaching skills were collected. Consequently, quantitative results indicated that SNSM increased teacher self-efficacy levels in terms of student engagement, classroom management and teaching methods. Qualitative data also support the results of quantitative data.