1. A medical image processing apparatus comprising: an image generator configured to generate a plurality of inside images based on inside information showing a tissue within a subject acquired in an examination of the subject and to generate an incidental information image which is formed per frame, upon receiving incidental information including at least either information on the subject or information on the examination, based on the incidental information, and to generate a reduced incidental information image and a plurality of reduced inside images; and an information processor configured to arrange the reduced incidental image and the plurality of reduced inside images in a first display area and, in response to a selection by an operator of one of the reduced images, to display a corresponding inside image or incidental image in a same second display area.