A hinge with a safety shield plate unit is designed not to cover the hinge but to be rotatably fitted to the fixed front shaft of the hinge and be resiliently urged toward the cup-shaped fixing member of the hinge by a resilient member in such a way that the safety shield plate unit is prevented from unnecessarily moving toward the cup-shaped fixing member by causing the anchoring sections of the movable link arm to abut the respective anchored sections of the safety shield plate unit. The hinge main body includes a fixing member fitted to a fixed plate and a cup-shaped fixing member fitted to a movable plate. The members are linked together by movable arms. A safety shield plate unit fitted to the fixed front shaft linking the fixing member and the movable link arm is urged downward to follow and hide the hazardous area defined by the movable arms and the cup-shaped fixing member and having a volume that increases with the opening movement of the movable plate. The anchored sections of the safety shield plate unit are held by the respective anchoring sections to prevent the safety shield plate unit from inadvertently falling into the cup-shaped space and blocking the opening movement of the hinge.