Abstract: A shield connecting system for a helmet has components mounted on the right and left sides of the helmet, and components that are provided on the face shield. The components that are mounted on each side of the helmet include a fixation mechanism that has a rotation member, a first resilient plate, and a second resilient plate which is installed under the first resilient plate. The fixation mechanism has a protrusion and a guide for guiding the rotation of the rotation member. The rotation member has at an adjacent portion thereof an aperture. An insertion guide portion to correspond to the aperture is formed in a front portion of the aperture. The first resilient plate has at a rear portion thereof a protrusion. The shield to be coupled with the fixation mechanism has, for an assembly of the assembly with the helmet body, at both inner end surfaces thereof a connection member to be inserted to the rotation member, a protruded guide, and a rack-shaped control member.