An imaging apparatus includes a lens unit condensing light from a visual field region, an imaging unit including an imaging element which converts light condensed by the lens unit into an electric signal and continuously generating electronic image data based on the electric signal, a storage unit storing the image data generated by the imaging unit, a display unit displaying an image based on the image data generated by the imaging unit, an input unit receiving an input of a change instruction signal used to change a first capturing mode at a first vertical-to-horizontal ratio to a second capturing mode at a second vertical-to-horizontal ratio and an image trimming unit generating a captured image by trimming an image included in image data generated by the imaging unit at a vertical-to-horizontal ratio between the first and second vertical-to-horizontal ratios, when the change instruction signal is input during the first capturing mode.