This study is a basic study to understand how elementary school pre-service teachers perceive and use teacher's guidebooks when planning social studies lessons. While preparing for the mock lesson, elementary school pre-service teachers critically analyzed the teacher's guidebooks and explored ways to use them on the premise of actual classes. Elementary school pre-service teachers analyzed, evaluated, and suggested improvements in terms of materials, classes, and learners for social studies teachers. Elementary school pre-service teachers said that resources for solving real-life case problems were needed for teacher's guidebooks in the social studies lesson planning process, and that they should include a fair perspective without bias, and specific problem solving and action plans. They also addressed that the materials in the teacher's guidebook will guide the teacher's role and learning process and help ease the learning burden. Elementary school pre-service teachers pointed out that while teacher's guidebooks are helpful when used in class planning, conversely, relying on formal lessons in the teacher's guidebook may hinder creative instruction or teacher expertise. Through this study, implications were obtained for the development of curriculum books to improve the teaching expertise of pre-service teachers in the future.