Present research is done for inspecting the reasons that cause further return of addicts to addiction in work therapy and reforming camping of Zanjan Province with the aim of recognition control source (internal & external) in those who have again return and also know the reasons and causes of effective factors in further return to addiction in 1381-82. Sample include 271 addict persons who return again. The manner of research is correlation which itself is a kind of descriptive measurement investigation by using of two questionnaires. The first questionnaire is on the basis of internal and external factors. Scale is used to determine information which is related to the basis of further tendency into addiction according theoretical grounds and hypothesis and for information analysis is used from descriptive statistical method. Findings of this research show: 77/2 percent of studied society have external control source. The most further return to addiction occur in 20-37 years which is approximately 39 percent and from this amount, 27 percent consist people who have internal control source. It is observed that further return in those people who are married is more than single people, and also there is most amount of further return among people who have less education and have internal control source rather than who have external control source. The average of further return period to addiction is 7 months and 19 days in studied society, and seperately, people who have internal control source, it is 3 to 10 days and those who have external control source, it is 6 months and 24 days.