A display device with a touch detection function including a plurality of touch detection electrodes arranged in parallel to extend in one direction, formed with a predetermined electrode pattern including an electrode portion and aperture portions, and each outputting a detection signal based on a change of an electrostatic capacitance in response to an external proximity object, a plurality of display elements formed in a layer different from a layer provided with the touch detection electrodes, and arranged by a predetermined number in a width direction in a region corresponding to the touch detection electrode, and a plurality of dummy electrodes arranged in an inter-detection-electrode region of the plurality of touch detection electrodes. The aperture portions are provided to allow an arrangement area ratio of the touch detection electrode to be almost equal to an arrangement area ratio of the dummy electrodes in the inter-detection-electrode region.