Squib

In an IC integrated type of squib that is used for communication and ignition, it is possible to prevent an explosive and the IC from mutually interfering with the performances of each other. A squib that is used by being connected to a bus is formed by assembling an explosive unit and a communication/ ignition unit that have been constructed as separate components. The communication/ ignition unit is provided with an IC substrate for ignition and communication that is electrically connected to a bus wire. The explosive unit is provided with explosive, an ignition element, and a header that is interposed between the ignition element and the IC substrate, and that electrically connects the two.