This study aims to describe students’ concept images on exponential function material based on learning experiences during the COVID-19 pandemic. The research method used was qualitative with a hermeneutic phenomenological approach. Data was collected by giving tests and interviews. The participants in this study were 15 students in one of the public high schools in Mataram City who had studied the exponential function. The data analysis used were 1) data reduction, 2) data presentation, and 3) concluding. The results showed that students still had difficulty in answering questions and were less able to relate the concepts they had when applying them in solving problems. This is because when learning during the COVID-19 pandemic, students only learn to use WhatsApp to discuss exponential function material, so students construct concept images independently without direction from the teacher. This research can be a reference in looking at learning obstacles so that they can develop an appropriate learning design regarding the learning of exponential functions and become a reference for teachers in using learning media so that students can get a good concept image.

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