Abstract: An electric ignition type initiator applies an electrical signal via a pair of electrical signal input portions to a resistance element connected across the electrical signal input portions to heat the resistance element to cause the heat from the resistance element to ignite an explosive charge and thereby operate a vehicle safety apparatus. The resistance element is formed by etching a film of nickel-chrome alloy provided on the top surface of a substrate. The first side of the resistance element extends in a straight line between the electrical signal input portions, and the second side is inclined from each of the electrical signal input portions so that the width between the first side and each incline on the second side decreases as distance from the respective electrical signal input portion increases. The resistance element has its minimum sectional area where the inclines meet.