1. An optical tomographic imaging apparatus, comprising: a tomographic image acquiring unit for acquiring a tomographic image by scanning an object to be inspected with measuring light; a two-dimensional image acquiring unit for acquiring a two-dimensional image of the object to be inspected; a patient information storage unit for storing images acquired by the tomographic image acquiring unit and the two-dimensional image acquiring unit together with patient information; a display unit; a display control unit for instructing the display unit about an image to be displayed; and a display input unit for accepting an external input to the display control unit via the image displayed on the display unit, the display control unit comprising an image parameter changing unit for changing an image parameter of the image, and being configured to control the display unit to perform a list display of patients whose patient information is stored in the patient information storage unit and to perform a list display of thumbnail images of the patient information of the selected patient, the display input unit being configured to accept a selection of one patient from the list display of patients and a change of the image parameter, the image parameter changing unit being configured to change the image parameter of at least one of the thumbnail images in accordance with an instruction to change the image parameter accepted by the display input unit, the display control unit being configured to control the display unit to display an image after the image parameter is changed.