The research is based on the emergence of learning obstacles of students on the topic of properties of triangles. The didactical design that the researcher designed is one of the first steps to overcome learning obstacles. The aim of the research was to develop a didactical design of the properties of triangles based on péclé traditional games for thirdgrade students of primary school. The research was conducted in the City of Tasikmalaya, Indonesia. The study used descriptive qualitative methods. The research instrument is equipped with teaching materials in the form of Student Activity Sheets (SAS). Data collection used is interviews, tests, attitude scale questionnaires and documentation. The results of the study indicate that the design that the researcher can use by teachers and elementary students to enrich the learning design, and can be developed further to minimize the obstacle learning of students in mathematics.