A scanner for probe microscopy that avoids low resonance frequencies and accounts better for piezo nonlinearities. A first load sensor is attached to one side of the seat to detect load and generate a first detection value. When in a protected position, a cover member 19 protects the intermediate transfer belt at a position corresponding to a nip between the intermediate transfer belt and a transfer unit, while when in a withdrawn position, the cover member 19 guides the recording paper. By combining the fixed mirrors with the micromirror arrays into a single structure, the spacing between adjacent arrays of inputs and the spacing between adjacent arrays of outputs can be reduced. The bottom chassis includes an accommodating portion for mounting a light guide plate, an optical sheet, and a reflection sheet; an inner sidewall for accommodating the light guide plate, the optical sheet, and the reflection sheet; and a lamp cover, where both ends of the accommodating portion are bent to enclose the lamp.