This research was conducted online using Zoom cloud meetings and studied and analyzed the improvement of junior high school students' creative thinking skills through problem-based and conventional learning. This study uses a quantitative method designed with a nonequivalent control group experimental pattern. The sample is 75 people, not taken randomly from two different classes. One class is problem-based learning, and another is conventional learning. Data collection was carried out using tests, namely the pretest and the posttest. They measure the increase in creative thinking skills using normalized N-Gain. The data were analyzed using an independent sample t-test. The study found that the problem-based learning model was more influential than conventional learning in improving junior high school students' mathematical creative thinking skills. Problem-based and conventional learning can improve junior high school students' mathematical and creative thinking skills.