The purpose of this study is to find out what difficult factors are in the use of science textbooks by special elementary school teachers in the 2015 basic curriculum for special education. Open questionnaires were used to specifically find out what are the difficulties they feel in the use of science textbooks. In June 2019, a teacher who has used science textbooks for more than one year was selected as a subject of the study by a convenient sampling method. and was told the purpose of the study. For one or two weeks in July, he was free to fill out his thoughts on the difficulties in the use of science textbooks and the questionnaire was retrieved in the third week of July. Collected questionnaire was conducted in the form of input-categorization-arearization, and inductive content analysis methods were used. As a result, 1530 factors were classified into 55 small areas. The content of the sub-area was classified into 14 medium-areas. In the end, the textbook was categorized into five large-scales : student factors (32.2%) of learners studying the textbook, support and environment factors (24.6%) based on the conditions of using the textbook, teacher factors (19%) based on the teacher’s capacity of being able to use the textbook, textbook factors (11.8%) indicating the operation of the textbook, and parents factors (6%) of parents needs and understanding. The aim through this study is to identify the difficult factors of the special teachers of elementary schools in using science textbooks for the 2015 Basic Special Education Curriculum, and seek the way to activate the use of science textbooks.