The present invention relates to a self-defense alarming device connected to a smart phone. In particular, emergency may be noticed to the outside through a smart phone. The self-defense alarming device connected to a smart phone of the present invention comprises: a plate-shaped body wirelessly connected to a smart phone and having a battery installed therein; an emergency button unit mounted on the body and exposed to the outside; a speaker mounted on the body; and a control unit for controlling operations between the body and the smart phone. The emergency button unit includes: a first emergency button formed on one side surface of the body; and a second emergency button formed on the other side surface of the body. When both the first emergency button and the second emergency button are pressed within a predetermined period of time, the control unit determines it is emergency and generate an alarming sound through the speaker. Emergency is noticed to a predetermined emergency handler through a wireless communication network of the smart phone.;COPYRIGHT KIPO 2015
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