A touch switch which prohibits a child from actuating heating means, while permitting a child to deactivate heating means. A cooking stove including an electrical capacitance operation switch 10 which switches the cooking stove between an operation state in which an ignition instruction is enabled and a standby state in which the ignition instruction is disabled; the operation switch is used to instruct the cooking stove to be extinguished. When the cooking stove is inactive, a switch circuit 63 selects a resistance element 61 offering a higher resistance to set the cooking stove in a “lower sensitivity set state” in which the operation switch 10 has a sensitivity sl. When the cooking stove is active, the switch circuit 63 selects a resistance element 62 offering a lower resistance to set the cooking stove in a “higher sensitivity set state” in which the operation switch 10 has a sensitivity sh (>sl).