ABSTRACT This research entitled "The Relationship of Socialization with Knowledge and Community‟s Decision to become member of LKC Dompet Dhuafa Aceh (Case Study: Lueng Bata, Banda Aceh)".The purpose of this study is to find out the answer about the socialization with the knowledge and the community's decision to be the member of LKC Dompet Dhuafa Aceh. LKC Dompet Dhuafa is a nonprofit organization which served the dhuafa community in the health sector through the management of social funds (ZISWAF-Zakat, Infak, Sedekah and Wakaf) and enterprise social funds. Poor society is very difficult to access health services. Besides because of the high cost, the limit of information and free health socialization is also being the factor of the infectious of dangerous diseases. The theory used in this research is Hierarchy of Effect Model. This theory said that there are several steps to take decision, those are cognitive, affective and behavior. The research method used a quantitative approach with explanative type. The instrument of data collection in this research is using questionnaires which distributed to the respondents and asked them to fill it out directly. In addition, Sampling methodology which used in this research is no probability sampling and quote sampling method. The result of data analysis is processed by using statistic parametric with pearson data analysis technique which showed correlation coefficient (r) 0.601 for socialization variable with public knowledge and correlation coefficient (r) 0.643 for socialization variable with community‟s decision. The first result hypothesis testing is obtained by tcount score at 7.010, and ttable score at 0.05 on the test of 2 sides is 1.662. Furthermore, the second result of hypothesis testing is obtained by tcount score at 7.835, and ttable score at 0.05 on 2 sides test is 1.662. In conclusion, on hypothesis, we can see that there is a positive and significant relationship between socialization with the knowledge of the community to become member of LKC Dompet Dhuafa Aceh. Moreover, there is also looked a positive and significant relationship between socialization to the community's decision to become member of LKC Dompet Dhuafa Aceh. All in all, it can be interpreted that the higher the socialization, the higher knowledge and decisions of society, and vice versa. Keywords: Socialization, Community’s Knowledge, Community’s Decision, LKC Dompet Dhuafa.