PROBLEM TO BE SOLVED: To provide an igniting agent for an initiator in a gas generator, particularly an electric gas generator suitable for activating a seat belt pretensioner or an airbag inflator, its manufacturing method and a method for manufacturing the initiator using the same. SOLUTION: The initiator has an ignition mechanism where the igniting agent is ignited by heat generated at a heating element connected via a pair of electric current transferring pins when an electric signal is given. The igniting agent for the initiator is slurry mainly comprising a mixture where a fuel component is zirconium and an oxidizer component is potassium perchlorate. A binder component is nitrocellulose whose blending amount is 0.1 wt.% or more and 0.5 wt.% or less in outer percentage to the total amount of zirconium and potassium perchlorate. A solvent is isoamyl acetate whose blending amount is 12.5 wt.% or more and 14.0 wt.% or less to the total amount of zirconium and potassium perchlorate. The igniting agent is coated on the heating element and dried. COPYRIGHT: (C)2007,JPO&INPIT