Earthquake alarm instrument

The utility model discloses an earthquake alarm instrument which relates to an electrical transmission audible signal device technique. The earthquake alarm instrument comprises a chassis (1), a bracket (3), a heavy hammer (5), a ring (4) and an alarm device (8) connected with the heavy hammer (5) and the ring (4), wherein, the bracket (3) is inserted in the chassis (1); the heavy hammer (5) is hung on the bracket (3); the ring (4) is fixed to bracket (3); the alarm device (8) is connected with the heavy hammer (5) and the ring (4). The utility model can send out alarm signals when small earthquake occurs and before a big earthquake occurs, so indoor persons can escape and shelter immediately.