The purpose of this research was to analyze the suitability of the material in the Geography textbook for Class XI Curriculum 2013 published by Mediatama based on the BSNP Textbook Criteria and the completeness of the 21st century (4C) skill components. This research uses qualitative research with a content analysis approach. The research subject used was the Geography textbook Class XI Curriculum 2013 Revised Edition published by Mediatama. The research subject was the Geography textbook for Class XI of the 2013 Curriculum, Revised Edition published by Mediatama. The data validity was done by triangulating the source. The research found that the books most used by the MGMP Sukoharjo were feasible (87,61%). Based on the results of the analysis, according to the material expert, chapter I has the highest aspect is creative thinking and communication aspects (100% completeness), chapter III is critical thinking, creative thinking and communication (100% completeness), chapter VII is critical and creative. think (100% complete). According to practitioners, chapter I is collaboration aspect (completeness 100%), chapter III creative thinking (completeness 85.7%), chapter VII critical thinking (completeness 89%). According to researchers, chapter I is creative thinking, communication, and collaboration (100% complete), chapter III and chapter VII are 100%.