The purpose of this study is to describe the difference between science process skill and science learning achievement between the students joining the contextual teaching and learning model and the students joining conventional learning model of the students of Elementary School. This research used the Posttest-only Control Group Design. The population of this study was the fourth grade students of Elementary School Cluster V Dr Soetomo. The sample of 91 students was taken by using random sampling technique. There were two kinds of instruments namely observation sheet and achievement test. The data obtained were analyzed using Manova. The result of this research indicates: First, the process skill of students joining the contextual teaching and learning model is better than those joining conventional learning model. Second, the learning achievement of students joining a contextual teaching and learning model is better than those joining a conventional learning model. Third, there is the influence of the implementation of contextual teaching and learning model on process skill and students' learning achievement simultaneously