Online learning becomes popular learning system since covid 19 outbreak. However, this learning system still continues to be used today. Online learning is also combined to offline learning. It is called hybrid or blended learning. Those learning are considered effective to achieve learning outcomes. However, to implement online learning effectively, teachers need competence in using learning technology. Learning management system (LMS) training includes training to operate learning application, such as creating accounts and classes and to develop teaching contents in learning application, such as developing teaching materials and assessment. This study aims to improve teachers’ competence in online teaching by learning management system (LMS) training. This study was action research. The subjects of this study were five English teachers of Islamic senior high schools in Parepare. The procedures of data collection were observation, interviews and documentation. The data analysis technique includes data reduction, data presentation and conclusion drawing. The findings showed that learning management system training can improve teachers’ competence in online teaching. The competence includes the ability to use application in teaching. In the first cycle, presentation and demonstration were method to train the teachers. In this cycle, teachers were able to create teachers’ accounts, students’ accounts, and classes. However, they are still got difficulties in developing teaching materials and assessment. In the second cycle, researchers added accompaniment and peer teaching to train teachers to develop teaching materials and assessment. In second cycle, teachers are able to achieve competence in using learning technology in online teaching.