This research aims at analyzing the effectiveness of environmentally-based science learning to improve the environmentally friendly character of the students in the coastal area. This was experimental research with one group pre-test -- post-test design. A total of 83 elementary students from the coastal area participated as a sample in this research. Samples were obtained through cluster random sampling. The test was administered to collect the data on student character. Wilcoxon test was administered in this research. The result obtained p < 0.05, where a significant increase in the environmentally friendly character of students in the coastal area was shown. This research concluded that environmentally based science learning is effective in increasing the environmentally friendly character of the students. This result was expected to contribute to the development of the environmentally friendly character of students by their teachers.