Online learning requires teachers' creativity to increase students' motivation to learn. This study aimed to determine students' motivations using a problem-based model during online learning. This research was experimental with a pre-and post-test control group design. The population in this study was all students of MIPA class XI, a total of 205 people. The sample for this research was class XI MIPA 1, which amounted to 32 people, and class XI MIPA 2, which amounted to 32 people. The sampling technique used was probability sampling (random sampling). The instrument used was a learning motivation questionnaire. The data were analyzed with the Independent Samples t Test. The results showed a sig. (2-tailed) value of 0.000 (p < 0.05), meaning that there are differences in the learning motivation of students with a problem-based learning model through online learning and those without using problem-based learning in class XI MIPA students of SMAN 3 Enrekang. According to this study, teachers can apply a problem-based learning model to increase students' motivation to learn.