Teachers of the new generation in Taiwan should have the capability for critical thinking and problem solving. In line with this approach，the Center of Teacher Education of Fu-Jen University has been applying problem-based learning （PBL） into the student teaching curriculum for years. The effectiveness and the difficulties of the application of PBL to the student teaching curriculum was assessed as a case study via surveys on 20 pre-service teacher education students and a focus group interview on 4 pre-service teacher education students. The study found that the questions for the cases were suitable and could help accomplish the learning aims. In addition，pre-service teacher education students’learning outcomes were improved，especially in the areas of teaching theories and practice. Furthermore，the facilitation of the teacher was the key to practice PBL effectively. However，applying PBL to the student teaching curriculum did reveal in problems on lack of time and phenomenon of social loafing. Lastly，the directions for improving the application of PBL for the student teaching curriculum are suggested by the researchers.