A face protector for a safety helmet, which is rotated upward and downward by a predetermined angle while being coupled to coupling pieces provided at opposite sides of the safety helmet, so as to protect the wearer's face, comprising: a body configured to protect the wearer's face; a pair of coupling units configured to be fixedly coupled to both the coupling pieces of the safety helmet, respectively; and a plurality of links (160a, 160b) used to connect the coupling units to opposite rear ends of the body, respectively, so as to restrict rotation of the body, wherein: the body has upper and lower operating shaft holes (122a, 122b) perforated, respectively, in both the rear ends thereof; each of the coupling units comprises: a fixing piece configured to be fitted to an associated one of the coupling pieces of the safety helmet and adapted to prevent unintentional movement of the coupling unit; and a supporting piece located at the outer side of the fixing piece and having upper and lower supporting shaft holes (148a, 148b) formed at a protruding portion thereof; and each of the links comprises upper and lower connecting shaft holes (162a, 162b) formed in opposite ends thereof, the links including upper links to connect the upper operating shaft hole with the upper supporting shaft hole through a shaft pin, and lower links to connect the lower operating shaft hole with the lower supporting shaft hole through a shaft pin, characterised in that if the body is rotated downward, a recessed edge portion of the upper link comes into close contact with one end of the lower link to restrict rotation of the body after being located in front of the wearer's face, and if the body is rotated upward, the other end of the lower link comes into close contact with an end of the upper link to restrict rotation of the body while preventing a lower end of the body from being lifted from a front end portion of the safety helmet and allowing the body to come into close contact with a front portion of the safety helmet. a body configured to protect the wearer's face; a pair of coupling units configured to be fixedly coupled to both the coupling pieces of the safety helmet, respectively; and a plurality of links (160a, 160b) used to connect the coupling units to opposite rear ends of the body, respectively, so as to restrict rotation of the body, the body has upper and lower operating shaft holes (122a, 122b) perforated, respectively, in both the rear ends thereof; each of the coupling units comprises: a fixing piece configured to be fitted to an associated one of the coupling pieces of the safety helmet and adapted to prevent unintentional movement of the coupling unit; and a supporting piece located at the outer side of the fixing piece and having upper and lower supporting shaft holes (148a, 148b) formed at a protruding portion thereof; and each of the links comprises upper and lower connecting shaft holes (162a, 162b) formed in opposite ends thereof, the links including upper links to connect the upper operating shaft hole with the upper supporting shaft hole through a shaft pin, and lower links to connect the lower operating shaft hole with the lower supporting shaft hole through a shaft pin, a fixing piece configured to be fitted to an associated one of the coupling pieces of the safety helmet and adapted to prevent unintentional movement of the coupling unit; and a supporting piece located at the outer side of the fixing piece and having upper and lower supporting shaft holes (148a, 148b) formed at a protruding portion thereof; and each of the links comprises upper and lower connecting shaft holes (162a, 162b) formed in opposite ends thereof, the links including upper links to connect the upper operating shaft hole with the upper supporting shaft hole through a shaft pin, and lower links to connect the lower operating shaft hole with the lower supporting shaft hole through a shaft pin,