| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical scanning device in a small-sized and a thin thickness with a high accuracy and little stray light, and an image forming apparatus comprising the optical scanning device. SOLUTION: An image forming apparatus is provided with an optical scanning device 12, or the like. The optical scanning device 12 is provided with a supporting member 21 comprising a side wall part 220 for surrounding the periphery and first plane part 211 to a ninth plane part 219 to be partition walls for the upper surface part and the lower surface part The plane parts 211 to 219 comprise a plurality of plate-like members formed in a continuous plate-like shape by a plurality of parallel linear bent parts, with a step provided in the range not interfering with the light flux for scan so that optical elements are arranged and supported so as to have the light flux on the supporting member one surface side and the light flux on the other surface side can approach with each other. The plane parts are formed with an angle such that the reflected light is not directly incident on the optical elements in the case an incident light derived from a light flux for scan is incident and the incident light is reflected.
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