Abstract: The invention concerns a protective helmet comprising a shell (1) whereon are rotatably mounted a visor (2) and a chin strap (3), the lower portion of the visor (2) being urged to rest on a zone (4) of the chin strap (3) when they are lowered and the chin strap (3) capable of being raised about the visor (2). The invention is characterized in that the helmet is such that it comprises additional means for moving the visor (2) configured to bring its lower edge closer to or move it away from the raising trajectory of the support zone (4) on the chin strap (3).