1. An imaging device configured to perform continuous shooting, comprising: an imaging unit configured to capture an image of a subject; a memory configured to store a content management list, the content management list including continuous shooting control information indicating a value of a control parameter related to continuous shooting; an imaging control unit configured to cause the imaging unit to perform continuous shooting in accordance with the stored continuous shooting control information; a recording unit configured to record a series of image information on a storage device; a display unit; a grouping determination unit configured to: generate the content management list, and determine, based on the stored continuous shooting control information, whether the series of image information is to be grouped together, the series of image information being obtained in one continuous shooting; and a display control unit configured to group a series of still images based on the series of image information recorded on the storage device according to the result of the determination of the grouping determination unit, and configured to cause the display unit to display the series of still images grouped; wherein the continuous shooting control information includes information indicating a continuous shooting speed, and the grouping determination unit is further configured to: determine that the series of image information are to be grouped together based on the content management list when the content management list indicates that the continuous shooting speed was set to high during image capture, and determine that the series of image information are not to be grouped together based on the content management list when the content management list indicates that the continuous shooting speed was not set to high during image capture.