This study aims to determine the effect of using the Problem Based Learning model on the Creative Thinking Ability of Class XI MAS Teladan Ujung Kubu students in the material of the human respiratory system. This research method is a quasi-experimental research design with a pretest posttest design. The research sample consisted of 30 people from the experimental class and 30 people from the control class. Sampling was done by cluster random sampling technique. The instrument of this research is an essay test based on four indicators of creative thinking, namely fluency, flexibility, originality, and elaboration. The results of hypothesis testing using the independent sample t-test obtained a sig (2-tailed) value of 0.000 <0.05 so that it can be concluded that H0 is rejected and H1 is accepted. This shows that there is an influence of the Problem Based Learning model on the Creative Thinking Ability of Class XI MAS Teladan Ujung Kubu students on the material of the human respiratory system
