An occupant restraint device controller, comprising: a sensor detecting acceleration or deceleration of a vehicle; and an electronic circuit substrate incorporating therein a control circuit that determines whether or not the vehicle has collided based on a detection output of this sensor and outputs a control signal for activating an occupant restraint tool, a resin case, the resin case housing the electronic circuit substrate, a ground lead-out member, the ground lead-out member connecting a ground electrode of the electronic circuit substrate located inside of the resin case to a location outside of the resin case, wherein the resin case includes a fixing leg for fixing the electronic circuit substrate inside the case, the ground lead-out member is provided as an independent part from the resin case, the ground lead-out member further comprising a first spring structure, a ground terminal and a second spring structure, the first spring structure being held between the fixing leg and the electronic circuit substrate, the ground terminal being held between the case and part of the vehicle, and the second spring structure having a bent shape and connecting the first spring structure and the ground terminal, wherein the ground lead-out member is configured such that the ground electrode of the electronic circuit substrate is electrically connected from the first spring structure fixed to the fixing leg located inside of the resin case to the ground terminal fixed to a portion of the vehicle, wherein the second spring structure enables grounding strength of the electronic substrate to be maintained even if the case reduces in size due to changes over time, wherein a portion of the first spring structure defines a cut-out section, wherein part thereof is cut out with a slit, and a step is formed to this cut-out portion. a sensor detecting acceleration or deceleration of a vehicle; and an electronic circuit substrate incorporating therein a control circuit that determines whether or not the vehicle has collided based on a detection output of this sensor and outputs a control signal for activating an occupant restraint tool, a resin case, the resin case housing the electronic circuit substrate, a ground lead-out member, the ground lead-out member connecting a ground electrode of the electronic circuit substrate located inside of the resin case to a location outside of the resin case, wherein the resin case includes a fixing leg for fixing the electronic circuit substrate inside the case, the ground lead-out member is provided as an independent part from the resin case, the ground lead-out member further comprising a first spring structure, a ground terminal and a second spring structure, the first spring structure being held between the fixing leg and the electronic circuit substrate, the ground terminal being held between the case and part of the vehicle, and the second spring structure having a bent shape and connecting the first spring structure and the ground terminal, wherein the ground lead-out member is configured such that the ground electrode of the electronic circuit substrate is electrically connected from the first spring structure fixed to the fixing leg located inside of the resin case to the ground terminal fixed to a portion of the vehicle, wherein the second spring structure enables grounding strength of the electronic substrate to be maintained even if the case reduces in size due to changes over time, wherein a portion of the first spring structure defines a cut-out section, wherein part thereof is cut out with a slit, and a step is formed to this cut-out portion.