An infrared imaging element comprising: - a photosensitive pixel array having a heat insulating layer and an infrared ray absorption member, the photosensitive pixel array including a plurality of photosensitive pixels arranged in a two-dimensional shape; - a driving line commonly connected with one pole of each of the photosensitive pixels for each of rows; - a vertical scanning circuit that is adapted to sequentially select the driving line to connect the driving line to a power supply; - a signal line commonly connected with another pole of each of the photosensitive pixels for each of columns, the signal line having an end part connected with first constant current source means; - a bias line that is connected in parallel with second constant current source means provided for each of the columns of the photosensitive pixel array, the bias line being adapted to generate a voltage drop substantially identical to that of the driving line; - a differential integration circuit provided for each of the columns of the photosensitive pixel array, the differential integration circuit being adapted for time-integrating and outputting a difference between a voltage across the first constant current source means and a voltage across the second constant current source means with a predetermined integration time; - a horizontal scanning circuit that is adapted to select an output signal of the differential integration circuit for each of the columns to guide the output signal to an image signal output terminal as an image signal; - a reference pixel array that is adapted to output a reference signal that changes substantially in accordance with a change in a temperature of a whole of the plurality of photosensitive pixels; - a bias generating circuit that is adapted to generate a bias voltage for applying the bias voltage to the bias line, the bias voltage corresponding to a difference between a predetermined reference voltage and a differential signal between the reference signal and a voltage at a predetermined position on the bias line, and characterized in that the bias voltage including a voltage component of an output level stabilized voltage; and - a voltage generating circuit (14, 14A) that is adapted to generate a predetermined temperature signal generation voltage based on the bias voltage, and add the predetermined temperature signal generation voltage to the image signal output terminal. - a photosensitive pixel array having a heat insulating layer and an infrared ray absorption member, the photosensitive pixel array including a plurality of photosensitive pixels arranged in a two-dimensional shape; - a driving line commonly connected with one pole of each of the photosensitive pixels for each of rows; - a vertical scanning circuit that is adapted to sequentially select the driving line to connect the driving line to a power supply; - a signal line commonly connected with another pole of each of the photosensitive pixels for each of columns, the signal line having an end part connected with first constant current source means; - a bias line that is connected in parallel with second constant current source means provided for each of the columns of the photosensitive pixel array, the bias line being adapted to generate a voltage drop substantially identical to that of the driving line; - a differential integration circuit provided for each of the columns of the photosensitive pixel array, the differential integration circuit being adapted for time-integrating and outputting a difference between a voltage across the first constant current source means and a voltage across the second constant current source means with a predetermined integration time; - a horizontal scanning circuit that is adapted to select an output signal of the differential integration circuit for each of the columns to guide the output signal to an image signal output terminal as an image signal; - a reference pixel array that is adapted to output a reference signal that changes substantially in accordance with a change in a temperature of a whole of the plurality of photosensitive pixels; - a bias generating circuit that is adapted to generate a bias voltage for applying the bias voltage to the bias line, the bias voltage corresponding to a difference between a predetermined reference voltage and a differential signal between the reference signal and a voltage at a predetermined position on the bias line, and characterized in that the bias voltage including a voltage component of an output level stabilized voltage; and - a voltage generating circuit (14, 14A) that is adapted to generate a predetermined temperature signal generation voltage based on the bias voltage, and add the predetermined temperature signal generation voltage to the image signal output terminal.