A reading device provided to obtain information specifying a product, the device including a housing, an imaging unit, and an illumination unit. The housing includes a transparent reading window. The imaging unit is built in the housing and captures an image through the reading window. The illumination unit illuminates an imaging target of the imaging unit by performing surface emission of light toward the outside of the housing. The illumination unit is disposed outside an edge of the reading window and is inclined with respect to the reading window so as to protrude more with respect to the reading window toward a side farther from the reading window.