Abstract This research aimed to investigate the problems of online learning of 191 EFL students majoring in English in Thailand. The qualitative data was collected by using the open-ended questions to explore the students’ problems relating to four primary skills, listening, speaking, reading and writing, when learning online. Then the content analysis was employed for the data analysis. The findings revealed would be used as the guideline to help language teachers and others concerned such as educational technology professionals and school administrators to create a more impactful experience for students while studying online. Keywords: Problems, Online learning, EFL students