This research was conducted to explain how communication barriers during online learning for teachers, students and parents of grade 3 students at Teluk Pucung State Elementary School in North Bekasi. The approach in this study uses a qualitative approach using phenomenological methods. The subjects or informants selected in this study were grade 3 teachers, grade 3 students and parents of grade 3 students. Data collection is carried out through observation, interviews and documentation. The results of this study show that there were communication barriers in the online learning process that took place yesterday, such as: teachers, students and parents experienced technical obstacles. Students and parents experience semantic barriers when the teacher delivers the material in a high tone/voice because the teacher anticipates if his voice is not heard when delivering the material but the student thinks that the teacher is angry. Students and parents experience behavioral barriers or humanitarian barriers such as students feeling bored and saturated quickly and students showing lazy behavior / attitudes during online learning, Parents of students are easily angry with their children if they are explaining or accompanying their children to do online learning. The three communication barriers that occurred in grade 3 of SDN I Teluk Pucung North Bekasi during online learning took place yesterday.