Contextual teaching and learning (CTL) is a conception that helps the teacher link the subject content to realworld situations and motivate students to make connections between knowledge and application in their lives. This study aims to describe the effect of applying contextual learning model to the scientific attitude of junior high school students on ecosystem material. This research is quasi experiment and uses the Matching Only Posttest-Only Control Group Design. The implementation of this study include of 33 students as experimental class and 32 students as control class in one of junior high school at East OKU. The research instrument used in in the form of rubric assessment, questionnaire, and observation sheet. Data was analyzed by using Microsoft Excel and SPSS program 16. The statically result showed that contextual learning model had an effect on improving students ’scientific attitude so that they could reach the minimum criteria. This is because the student can learn the lesson material presented through the context of their lives, and find meaning during the learning process, so that learning will become more meaningful and fun with the ecosystem material. This learning model can improve students’ scientific attitude through the syntax contained in it. Keywords: CTL learning model, scientific attitude