This study aims to review Therapeutic Community(TC) Model which has been proved as effective drug abuse treatment and to analyze factors influencing the decision-making process of TC service among drug users. This study was conducted based on the help-seeking process model which integrated the factor model of health service utilization and the process model of decision-making process model. Findings showed drug users' decision to use the TC service has undergone the stage of problem recognition – intention to use of treatment services – decision-making of TC service use. In specific, gender, previous treatment experience, number of convictions, social support, drug social network, and severity of drug use influenced the first stage. Next, gender, previous treatment experience, and severity of drug use affected the second stage through the first one. Finally, previous treatment experience was the only significant factor in the decision-making process for the use of TC Service.