Rules in boxing are important because of they provide the same conditions to boxers to show their best performances at competitions. World Boxing Federation (AIBA) changed rules in duration of combat. Therefore since 1997.year rules 3×3 minutes altered to 5×2 minutes and in 1999.year 5×2 minutes altered to 4×2 minutes and since 2009. 4×2 minutes returned to 3x3minutes. The aim of this paper is to determine effects of changes of boxing rules on performances of amateur boxers between two state championships of Bosnia and Herzegovina in boxing in 2007.year and in 2016.years. Notation analysis of performances of amateur boxers was used on sample of 80 combats of State Championship of Bosnia and Herzegovina 2016. year which lasted 4×2 minutes and on sample of 48 combats of State Championship of Bosnia and Herzegovina 2016.year which lasted 3×3 minutes. Results of Chi-square test showed that statistically significant changes occurred in variables of punches, basic defenses, advanced defenses and way of wining, while variables of tactic elements of boxing didn’t show statistically significant changes. International Boxing Association (AIBA) decision of returning rules on 3×3 minutes was good decision for boxing because boxers can show their best technical and tactical qualities for bigger efficiency and reduce of injuries and therefore boxing is more interesting to watch. Results of this research can be useful for referee organizations, coaches and competitors in function of more efficient planning and programming training process and especially for boxing scientific community.