To obtain a tempered-glass breaker that is to be used in emergency situations by an occupant trapped in a vehicle to break a window pane of glass (hereinafter referred to as "the tempered glass") of the vehicle for escaping from the vehicle.

The tempered-glass breaker is produced by molding a synthetic resin, and has a rectangular solid shape with a length of approximately 150 mm, a width of approximately 25 mm, and a thickness of approximately 2 mm so as to be capable of being clipped onto a vehicle sun visor. The base of a cemented carbide portion for breaking the tempered glass is firmly fixed to the front end of the rectangle. A hemispherical impact portion, which has a height of approximately 20 mm is provided at the front end to firmly fix and cover the base of the cemented carbide portion and to serve as a weight as well. To break the tempered glass, a rectangular flat surface, from which an acute-angled cemented carbide blade edge of the impact portion protrudes vertically, is pressed against the tempered glass. A bent grip portion, which is used for pressing the flat surface and has a length of approximately 75 mm, a height of approximately 20 mm, and an S-shaped cross section, is provided at the rear end of the rectangle.