A Team TotalEnergies rider crashed into fans at high speed as they lined up along a cobbled street during Stage 5 between Lille and Arenberg.
The footage shows Oss losing his balance after cutting off one fan and then colliding with another who leaned over to film the race on his phone.
“Therefore, Daniel Oss is forced to leave the Tour de France… The whole team wishes you well, Daniel.”
During Stage 5 on Wednesday, there were a number of crashes, though not all serious ones, as the riders raced over the cobblestones.
The Italian rider was somehow able to finish the stage despite a crash that also involved two other riders who fell behind him.
Tadej Pogacar of Slovenia is now the overall leader of the Tour after winning Stage 6.