The utility model discloses a safe box, including the cabinet body, sensor and speaker, the rear portion of this cabinet body is equipped with the back lateral wall of concave yield inwards, and the back lateral wall of the concave yield rear end that makes the cabinet body forms a notch inwards, be equipped with a thru hole on the back lateral wall of the cabinet body, one side of sensor is equipped with the inductive head that transversely stretches out, and this inductive head matees with the thru hole of above -mentioned back lateral wall, pass the thru hole of the back lateral wall of the cabinet body with the inductive head of sensor, again with the sensor rigid coupling on the back lateral wall of the cabinet body, the speaker is connected on the lateral wall of the cabinet body, is provided with the circular thru hole that a plurality of is used for propagating sound on this lateral wall position relative with the speaker, be connected with the response magnetic path on the wall, the inductive head that should respond to the sensor on magnetic path and the cabinet body is corresponding, place the cabinet body and responding to the subaerial of magnetic path below to inductive head on messenger's cabinet body pastes mutually with the response magnetic path on the wall and leans on.