1. A moving picture image pickup device comprising: an image pickup section for picking up an image of an object and obtaining a picked-up moving picture consisting of a plurality of frames; and an image processing section for processing, per frame, the picked-up moving picture and creating a storage moving picture, wherein the image processing section includes: object designating means for designating, in accordance with an instruction by a user, a plurality of object images in the picked-up moving picture; object trimming image setting means for setting a plurality of object trimming images for clipping, out of the picked-up moving picture, the plurality of object images designated by the object designating means; object following means for following the plurality of object images designated by the object designating means and moving, per frame, the plurality of object trimming images in accordance with the plurality of object images; first trimming image setting means for setting, per frame, the plurality of object trimming images as a first trimming image; second trimming image setting means for setting, per frame, one image enclosing the plurality of object trimming images as a second trimming image; first data size calculation means for calculating, per frame, a data size of the first trimming image; second data size calculation means for calculating, per frame, a data size of the second trimming image; comparison means for comparing, per frame, the data size of the first trimming image with the data size of the second trimming image; and selection means for selecting, per frame, as the storage moving picture, an image which is determined as having a smaller data size by the comparison means, from the first trimming image or the second trimming image.