كتب : Hatem Maher
Piotr Trochowski fired the hosts in front after 29 minutes with a low bullet from inside the area.
Schalke defender Benedikt Hoewedes leveled the score three minutes after the restart.
He connected with Jefferson Farfan's free-kick to head past Hamburg keeper.
Hamburg regained their position on top of the league table with 17 points, one ahead of surprise package Hoffenheim.
Watch Hamburg's goal
Watch Schalke's goal