To improve image quality by reducing moire occurring in images available in the final stage even without the use of a high-resolution readout imaging means.

The optical readout type radiation-displacement transducing device has a substrate 1 and a plurality of devices two-dimensionally arranged on the substrate 1. Each device has an infrared ray absorbing part 7 absorbing an infrared ray i, a displacement part which undergoes displacement in response to heat generated in the absorbing part 7, and a reflector 9 which receives readout light j, and reflects the light received in the direction corresponding to the displacement of the displacement part. The reflectors 9 arranged on neighboring columns in the Y direction (namely, columns extending in the X direction) are arranged on the positions deviated by half the positioning pitch in the X direction.