To provide a burglary prevention tag capable of locking respective commodities by preparing only one burglary prevention tag for plural commodities.

First and second tag bodies 10, 20 are respectively provided with double coated adhesive tapes 10a, 20a for locking commodities and limit switches 11, 21 for detecting separation from respective commodities. The 1st and 2nd tag bodies 10, 20 are connected to each other by a 2nd wire 40, a 1st wire 30 derived from the 1st tag body 10 forms a loop 31 allowing the 1st and 2nd tag bodies 10, 20 to pass through it, a limit switch detection circuit 12 detects the separation of the 1st tag body 10 or the 2nd tag body 20 from a commodity, and a wire cut detection circuit 13 detects the cut of the 1st wire 30 or the 2nd wire 40. An alarm circuit 14 generates an alarm in response to detection by the detection circuit 12 or 13.