This current study aimed at investigating Bahasa Indonesia textbooks with regards to local wisdom issues. The preliminary study was utilized as the basis for developing instructional materials of Bahasa Indonesia that are rich of characters. Bahasa Indonesia instructional materials containing local wisdoms not only equip students with broad knowledge, but strong characters as well. Qualitative research method was employed for the purpose of this current study. After analyzing the contents of seven Bahasa Indonesia textbooks for Grade 10 Senior High School, there were some tapped local wisdoms. However, some of texts were subject to changes, replaced by various texts originating from a number of regions throughout Indonesia. Those intended texts contained more local wisdoms and contributed to students' broadened knowledge about diversities in Indonesia.