The study was conducted to the people living in the radius of 500–1000 meter in tidal area of conservation area of Mangrove forest. The research design of this study was descriptive quantitative in order to describe the knowledge, attitude, and behavior manifestation of society in preserving Gastropoda. Correllational descriptive design was employed to describe the relationship between knowledge and attitude and behavior manifestation of society in preserving Gastropoda. The respondents were obtained by purposive sampling technique. The data analysis was conducted in SPSS 16 for Windows. The result of study showed that: (1) mean of knowledge level was high (75,65%), attitude was moderate (69,37%), and behavior manifestation was high (82,44%) and (2) meanwhile, the result of analysis for knowledge, attitude with behavior manifestation of society in preserving Gastropoda Mangrove forest in Tarakan showed that there was significant correlation. |