An imaging system includes: an illumination unit that emits illumination light to illuminate a subject a light receiving unit in which pixels that receive light and photoelectrically convert the received light to generate an electric signal are two-dimensionally arranged a read unit that sequentially reads the electric signal from the pixels for each horizontal line and an illumination controller that controls the illumination unit to emit a pulse of the illumination light during a period straddling a read period of the read unit for a first horizontal line and a read period for a second horizontal line which is adjacent to the first horizontal line and which is read immediately after the first horizontal line.
