The purposes of this study were : (1) to examine the effects of persuasive messages on rehabilitation attitudes of drug addicts by taking education level and status of patients into account; (2) to investigate if there was any correlation between persuasive messages and admitting behavoir, and any relationship between admitting intention and admtting behavior. 
              The subjects of this study consisted of 120 male in-patients attending 15-20 days of detoxification treatment at Thanyarak Hospital. On 15th day of such treatment, the subjects were asked whether or not they had intention to take  rehabilitation period. The sample was then devided into two groups, experimental and control ones. Some variables were taken into account such as education level (high and low), patient's status (old or new patient). Persuasive messages 
( slides concerning bad effects of drug abuse ect.) were shown to the experimental group while the control one had routine activities. The experimenter then administered a questionnaire concerning rehabilitation attitudes to both groups. After the period of detoxification treatment (21 day) was over, the experimenter observed which patient had admitting behavior  in rehabilitation period. Analysis of the data consisted of various statistical methods and the SPSSX computer programs. 
              The main research findings are as follows: 
                1) In admitting intention group, patients with lower education level without persuasive messages taken are found having rehabilitation attitudes concerning physical settings and environments of therapeutic community better than (i) the counterparts with higher education level without persuasive messages taken; (ii) the counterparts with lower education level with persuasive messages taken. 
                2)  In admitting intention group, it is apparent that ;  (i) patients with higher education level with persuasive  messages taken; (ii) patients with lower education level with persuasive messages taken; and (iii) patients with lower education level without persuasive messages taken, have rehabilitation attitudes concerning  period of treatment better than the counterparts with higher education level without persuasive messages taken. 
                3)  As for new-patient group, it appears that persuasive messages have significant correlation with admitting behavior variable. 
                4)  There is close relationship between admitting intention variable and admitting behavior variable.