The research aimed to know the effect of Problem-Based Learning model supported by problem card media on cognitive learning outcomes and environmental care attitude of the TNWK by students of SMPN 1 Labuhan Ratu. The research design used in this study is the non-equivalent control group design. The research took sample of 60 students consisting of class VII 5 as a control class and VII 6 as an experimental class with cluster random sampling technique. The type of data in this research is quantitative data in the form of score on students’ cognitive learning outcomes and environmental care attitude of the TNWK. The data were obtained from environmental pollution questions and attitude questionnaires were analysed using the Independent Sample T-test. The results showed that at the 5% significance level, the Sig. score was obtained (2-tailed) 0,000<0,05 for cognitive learning outcomes and 0,004<0,05 for environmental care attitude. So it can be concluded that there is a significant effect of Problem-Based Learning model supported by problem card media on cognitive learning outcomes and environmental care attitude of the TNWK.