A sensor control device comprising: a circuit board separated from and electrically connectable to a gas sensor, said gas sensor comprising a detecting element configured to output a concentration response signal in response to the concentration of a specific gas component, and a heater element configured to activate the detecting element; a detecting element driving unit (26, 27, 22) mounted on the circuit board, the detecting element driving unit (26, 27, 22) being configured to: control the gas sensor; calculate gas concentration information based on the concentration response signal; and output the calculated gas concentration information to an external circuit; and a heater element driving unit mounted on the circuit board and configured to supply driving current to the heater element, characterized by a temperature sensing element mounted on the circuit board and configured to output a temperature response signal in response to a temperature of the circuit board; a temperature calculating unit mounted on the circuit board and configured to calculate temperature information of the circuit board based on the temperature response signal; and a concentration information correcting unit mounted on the circuit board and configured to correct the gas concentration information calculated by the detecting element driving unit (26, 27, 22) based on the temperature information calculated by the temperature calculating unit, wherein the temperature sensing element is located closer to the detecting element driving unit (26, 27, 22) than to the heater element driving unit, or the temperature sensing element is arranged within the detecting element driving unit (26, 27, 22). a circuit board separated from and electrically connectable to a gas sensor, said gas sensor comprising a detecting element configured to output a concentration response signal in response to the concentration of a specific gas component, and a heater element configured to activate the detecting element; a detecting element driving unit (26, 27, 22) mounted on the circuit board, the detecting element driving unit (26, 27, 22) being configured to: control the gas sensor; calculate gas concentration information based on the concentration response signal; and output the calculated gas concentration information to an external circuit; and control the gas sensor; calculate gas concentration information based on the concentration response signal; and output the calculated gas concentration information to an external circuit; and a heater element driving unit mounted on the circuit board and configured to supply driving current to the heater element, a temperature sensing element mounted on the circuit board and configured to output a temperature response signal in response to a temperature of the circuit board; a temperature calculating unit mounted on the circuit board and configured to calculate temperature information of the circuit board based on the temperature response signal; and a concentration information correcting unit mounted on the circuit board and configured to correct the gas concentration information calculated by the detecting element driving unit (26, 27, 22) based on the temperature information calculated by the temperature calculating unit,