Cooperative learning (Cooperative Learning), which is one of small group learning methods, is suggested as one of open learning. Cooperative learning adapt the learning style that the task given by the teacher is done by two to six students of different group. Therefore, the students of each group participate in various learning activities that require cooperation and mutual support. Based on this situation, the purpose of this study was settled as the investigation what influence is exerted on the performance of learning and learning attitude by cooperative learning through studying and practicing cooperative learning model consistently with health subject. The model of cooperative learning applied to this study is based on LT (Learning Together) technique. The result of the study was as follows: First, in terms of the effect on health knowledge, statistical significance was found between pre cooperative learning and post cooperative learning, and when elevated mark on knowledge and increased satisfaction level after cooperative learning was considered, it be considered that the effect is greater after practice of cooperative learning in comparison to no practice of cooperative learning. Second, according to the survey on the opinions of students on cooperative learning, cooperative learning increased participation of students, provides with self-study method and self-confidence, makes students feel the importance of their respective roles in the group, and improves cooperative attitude, in comparison to traditional learning. The points of suggestion from this study to child safety education are as follows: First, cooperative learning is an effective method to induce high participation level in safety education which can show high effect with high participation of students only. Second, safety knowledge may be shared and safety behavior and safety attitude may be changed through cooperative learning.