Project Based Learning (PBL) is a teaching and learning method in which students actively solve real-world problems and gain knowledge and skills. The teaching experiences, materials, and methods for PBL have diversity and are not shared with universities. The Faculty Development - Working Group (FD-WG) performs to share them with universities but the sharing method does not mainly use active learning. We present the Faculty Development (FD) camp for PBL, in order to share them with active learning for reducing education costs. The FD camp provides the place of discussing the PBL to the participants, in order to solve problems of PBL. We hold four FD camps with Open Space Technology (OST), which was a simple way to run productive meetings. Evaluations in questionnaires showed that almost all participants had good impressions in the FD camp with OST. We learned five lessons from four FD camps.