St Etienne have sacked coach Laurent Roussey on Monday after the Ligue 1 side dropped into the relegation zone with a fifth successive league defeat.
The French club did not name a replacement.
"St Etienne have decided to reshuffle their sporting organisation and to relieve Laurent Roussey of his duties," the club said in a statement.
St Etienne, who have won a record 10 French titles, are 18th in the 20-team league with 10 points from 13 games.
They lost 3-0 to Stade Rennes on Sunday, their third home defeat in a row in Ligue 1.
Roussey was appointed at the start of last season and he led St Etienne to a fifth-place finish.