An imaging apparatus includes an image-forming optical system assembly, an image sensor, a sensor retaining portion that retains the image sensor, a coupling portion that is fixed to the image-forming optical system assembly, and a movement suppressing member that is immovable with respect to the coupling portion. The image-forming optical system assembly includes an optical system-side adhesive surface, the coupling portion includes an opposite surface, and the sensor retaining portion includes a sensor-side adhesive surface. A first adhesive is filled in at least a portion of a gap between the optical system-side adhesive surface and the sensor-side adhesive surface, and comes into contact with both of the optical system-side adhesive surface and the sensor-side adhesive surface. The movement suppressing member contacts the opposite surface, and contacts the sensor retaining portion on a surface facing the rear side out of surfaces of the sensor retaining portion.