The author deals with creation of national unfair competition laws. He refers to two models of evolution of this law - the French and German ones. He especially focuses on the evolution of unfair competition law in the territory of former Czechoslovakia. He analyses in detail the individual historical periods, and in particular the first model Czechoslovak act on protection against unfair competition. In the following section of his article he deals with unfair competition legislation in the years of 1918 - 1938 and in the years of 1938 - 1990.