To enable a burglar prevention device to be easily installed or released by reducing the number of cords derived from its main body and forming a loop of optional length.

In this burglary prevention device 1, a cord 3 consisting of covered conductive wires derived from the body is latched to a fixture 7 or a commodity in a store, and at the time of detecting circuit abnormality such as the disconnection/short-circuit of the wire 3, an alarm is generated. The cord 3 is constituted as a single cord obtained by covering or bundling plural conductive wires, a clip member 2 is formed on a prescribed position of the cord 3, which is clipped by the member 2 to electrically connect plural conductive wires and form a latch loop 5 on the cord 3.