Abstract: This paper deals with precedent in the Argentine Supreme Court by describing how it works both vertically and horizontally. It explains the current doctrine of precedent the Court develo-ped through its case law and analyses its workability in some recent cases. Finally, it examines some necessary techniques related to a proper use of precedent, such as the acknowledgment of the material facts, the structure and clarity of judicial decisions, its publication, and the identification of legitimate (and illegitimate or, at least, questionable) factors of overruling.