Paul (Paúl) Klein (born 1930) a German–Ecuadorian chess master and arbiter.[1][2]

Born in Germany, he emigrated to South America because of Nazi policy. Klein played for Ecuador in the 14th Chess Olympiad at Leipzig 1960. [3]

Awarded the International Arbiter title, he was a Head Referee in the 23rd Chess Olympiad,[4] and in the 8th Women's Chess Olympiad,[5] both at Buenos Aires 1978. He was also the head referee at the World Chess Championship rematch between Anatoly Karpov and Viktor Korchnoi at Merano 1981.[6]