The objective of this present research is to develop an Indonesian Syntax textbook. At the exploratory stage, a descriptive-qualitative approach was adopted. The data were collected using a documentary study, observations, and questionnaires and analyzed through a contextual model. The model was experimentally tested. At this stage, some main findings are obtained: (1) the learning activities of Syntax were lecturers-centered and theoretical; (2) the lecturers and students needed an Indonesian Syntax textbook with the contextual. The prototype was then tried out limitedly and extensively. The results of the try out showed that the learning model was appropriate for improving the students' ability in learning syntax. The prototype of the learning model that had been applied was made as a learning model, then it was tested through experiments. Based on the statistical analysis using a standard deviation, the t[subscript count] of the posttest results namely was 2.339, and since the t[subscript count] was 2,0086, meaning that the t[subscript count] is higher than that of t[subscript table] with significance of 0.030 < 0.05, It is concluded that the Indonesian Syntax textbook adopting a learning model with the contextual approach is more effective than that with a conventional model.