Sadamba Tcha-Koura (born 1960 in Bowounda), pen-name Sami Tchak, is a Togolese writer.

After a dissertation in philosophy at the University of Lomé in 1983, Sami Tchak taught in a high school for three years.

He arrived in France in 1986 to start his sociology studies, and obtained his PhD at the Sorbonne University in 1993.

Since the novel Hermina, published by Gallimard in 2003, all his works take place in an imaginary Latin American setting, which actually is far more similar to Africa.

In 2004, Sami Tchak won the Grand Prix of Black African Literature for the entire range of his work.