1. An imaging apparatus comprising: an image sensor which outputs a picture image according to an optical image projected to the image sensor through an optical system; an image moving portion which moves the optical image on the image sensor; a motion detecting portion which detects movement information on the picture image from the image sensor and which detects a movement on the picture image of a moving subject that appears in the optical image; and a control portion which performs image movement control, wherein in the image movement control, the control portion controls the image moving portion in such a direction as to cancel a movement of the moving subject on the image sensor due to a movement of the moving subject in a real space, based on a movement of the moving subject detected in advance, the image movement control is inhibited from being performed when a predetermined condition is satisfied, wherein the motion detecting portion calculates a plurality of regional motion vectors one for each of a plurality of split regions within the picture image from the image sensor to detect the plurality of regional motion vectors as the movement information, the control portion compares each of the regional motion vectors with an average vector of the regional motion vectors, and whether or not the predetermined condition is satisfied is decided based on a result of the comparison by the control portion.