Abstract: The present invention relates to a protective helmet (1) comprising shock-absorbing means in the form of movement discs (6) each comprising an outer ring (7); a central “bead” or tenon (9); a plurality of deformable arms (8), both ends of which substantially tangentially connect the outer ring (7) and radially connect the central bead (9). The deformable arms (8) have a length of at least 1.5 times the radius of the outer ring (7) so as to be able to form, by deformation, a conical and elastic structure whereof the central bead (9) is located at the apex and is in contact with the rigid outer shell (2). The movement discs (6) are further secured to the inner face of the rigid outer shell (2), such that in the static position, the inner structure (3) is separated from the rigid outer shell (2) by an interval (14).