The former Marseille and Manchester United man, who won the World Cup with France on home soil in 1998, believes with the exception of Les Bleus' current number one, Hugo Lloris, goalkeepers must sharpen up their act.
Quoted in L'Equipe, Barthez said: "In France, as a general rule, the level of goalkeepers has fallen.
"What bothers me most at the moment is their behaviour. After a save, we see some of them celebrate as if they had scored a goal. That is not their job!
"Concentration is paramount and with such gestures, you lose the instinct. They must always be asking questions."
Asked who else could challenge Tottenham goalkeeper Lloris and Marseille number one Steve Mandanda, Barthez added: "For the moment, nobody."