An image sensing apparatus comprises: a pixel array including a first pixel group and a second pixel group; a first readout unit which reads out a first signal from the first pixel group in a readout period which remains constant regardless of the operation modes; a second readout unit which reads out a second signal from the second pixel group in a readout period selected in accordance with a switched operation mode between the operation modes; and a control unit which controls a performance of generating an evaluation value by using the first signal of the first pixel group, and which controls at least one of image displaying performance and image recording performance by using the second signal of the second pixel group.