The objectives of the study were: (1) to determine the knowledge, attitudes, and behavior of the community in managing household waste before and after the experiment in the coastal area of Pangkep Regency, (2) to determine the effect of the experiment on waste management on increasing the knowledge, attitudes, and behavior of the community in managing waste in the coastal area of Pangkep Regency, (3) to determine the effect of the experiment whose material was about the procedures for managing waste that is healthy and safe for the environment in the coastal area of Pangkep Regency. This research is classified as quantitative research and the approach used is experimental research. The location of the research is Labakkang District, Pangkep Regency. Respondents totaling 25 heads of families were selected using the purposive sampling method. The experimental design used was One Group Pretest-postest Design (Borg and Gall, 2008). The research variables were: (1) knowledge about waste, (2) attitudes towards managing waste, and (3) behavior in managing waste before and after the experiment. The data analysis techniques used were: (1) Descriptive statistical analysis, and (2) inferential statistical analysis. The analysis model used was the difference test (dependent t test). The results of the study showed that: (1) the knowledge, attitudes, and behavior of the community in managing household waste in the coastal areas of Pangkep Regency before the experiment was carried out were in the low category, (2) the knowledge, attitudes, and behavior of the community in managing household waste in the coastal areas of Pangkep Regency after the experiment was carried out were in the high category. (3) the influence of the experiment whose material was about the procedures for managing waste that is healthy and safe for the environment in the coastal areas of Pangkep Regency had a very significant influence.