Up to now, social construction is still held by patriarchal views that result in the emergence of male domination in all fields, including in elementary education. Although the government has tried to suppress this bias, some practices still make one gender appears inferior. This study aims to determine if there is gender bias in elementary school students' thematic book questions. This research is a qualitative research in descriptive form. The research method used is the study of document content or content analysis, inferential type. The data source of this research is a document in the form of the 2013 Curriculum Second Grade Student Book. Based on the results of this study, researchers found that there is still gender bias in terms of the number of illustrations, professions, interests, and domestication of roles in one gender. Some suggestions were submitted to book authors as well as illustrators based on the findings of the study. [For the complete volume, "Proceedings of International Conference on Studies in Education and Social Sciences (Antalya, Turkey, November 11-14, 2021). Volume 1," see ED625228.]