Abstract Field work for a year in three groups of Alcoholics Anonymous located in Barcelona City. The research was complemented by interviews with informants and people professionally and academically linked with drug addiction matter. The research purpose was to understand the internal dynamics at AA that, based on a regulatory system, are replicated all over the world since its founding in 1935. Find out the specific norms and its results was the main task in that particular part of the author’s Doctoral Thesis. The research in the referred field work began to be blind, so without a prior hypothesis. The final conclusions show that AA is a Normative Community with a ceremonial very close to a Rite of Passage with a long period of liminality, and are delivered like a theoretical interpretation on the reality observed at AA, built according with the empiric data coming from participant observation and mentioned interviews. Key-words: Alcoholics Anonymous, Alcohol, Therapy, Self-help Groups, Rites of Passage.