The utility model provides a safety helmet, including the cap body and half brim of a hat that is formed by the edge extension of the cap body, wherein, safety helmet still includes illuminator and fixing support, and the setting that illuminator can the dismouting is on fixing support, and fixing support includes pedestal and at least one support ring, and what the pedestal can be dismantled installs on the cap body, and on the support ring is fixed in the pedestal, and the axis of support ring is on a parallel with the direction that half brim of a hat extends along the cap body, and the settlement of wearing that axis that illuminator follows the support ring can be dismantled is located the support ring. The utility model discloses a set up the fixing support who has the support ring on the outer wall of the cap body to wear to establish in the support ring along the axis of support ring with illuminator, can with illuminator install on safety helmet and guarantee illuminator's lightmap direction and the direction that half brim of a hat extends unanimous, and can be convenient take or insert illuminator out support ring from the support ring in realize taking off and installing of illuminator, it is very convenient to use.