This study aims to (1) describe and analyze the syllabus development needs of 1st grade at MI Kalibening, (2) find out the form of syllabus development of 1st grade at MI Kalibening, (3) determine the effectiveness of the application of integrative thematic syllabus towards the changing of 1st-grade students character at MI Kalibening. The method of this study is Research and Development (R&D). The research model used is an instructional design model used is ADDIE (Analysis – Design – Develop – Implement – Evaluate). The result of this study are (1) the syllabus development from grade 1-6 at MI Kalibening is very needed, because that syllabus development as a reference for preparing lesson plan in implementing teaching-learning process every day, (2) the syllabus development of 1st grade consists of several components, namely: load the content of IMTAQ, standard competence (SK), basic competence (KD), the material/learning, teaching-learning process, the indicators of competence achievement, assessment, time allocation, and learning resources, (3) the use of integrative syllabus is effectively used to improve the 1st-grade student’s character at MI Kalibening. The result can be seen from the t-test that Mean score of the student's IMTAQ character in the second meeting class 1B is 79,90 and the second meeting class 1A is 90,38 and the t-test result obtained sign = 0,000 because it was significant, lower than 0,05 (0,000 < 0,05) therefore H1 is accepted. It means the use of an integrative syllabus is effectively can be used to improve student's IMTAQ character, p-value 0,000 < 0,05