The purpose of this research and development is to produce a material in the form of inquiry based thematic module on the theme Daerah Tempat Tinggalku (region of my dwelling place) for Fourth Grade Students of Elementary School in Malang City valid and effective. The result of this study showed that validation from the expert is 83.33% in quite valid and the design is 90.38% in very valid criteria. The result of the small group tryout by using students’ questionnaire was 95.19% in very valid criteria. The result of field tryout by using students’ questionnaire was 91.61% in very valid criteria. The effectiveness of the module by using t-test result showed that the using of module in the experiment class was effective to increase the students’ learning outcome.