France managed to bring down the two-time defending world champion Poland in the tie-break, three sets to two, 21-25, 25-22, 21-25, 25-21, 15-9.
The best Polish player Leon was not enough, despite his 29 points.
For his part, Imperial Jean Patry scored no less than 21 points.
The Blues have qualified for the first Olympic semi-final in the history of French volleyball.
The full Olympic program
The Olympic medal table
After dropping the double Polish world champions in the quarter, the Blues will face in the semi-final, Argentina, victorious over Italy (3-2).