A welding helmet (1) that has a protective shield (2) and a head suspension system (6). The protective shield and the head suspension system are pivotally connected to each other for swiveling the protective shield relative to the head suspension system about a pivot axis in opposite directions upward or downward between a protective position, in which the protective shield covers a wearer's face, and an upraised position, in which the protective shield uncovers the wearer's face. The welding helmet further has a stop mechanism (10) that restricts downward swiveling beyond the protective position. The stop mechanism is adjustable by a worm gear mechanism (11, 12) between a low position and a high position. In the low position the protective position of the protective shield is offset downward with respect to the high position.
