To provide a thin touch panel, a touch panel with high visibility, a lightweight touch panel, or a touch panel with low power consumption. A pair of conductive layers is included in a capacitive touch sensor. The two conductive layers have a mesh shape including a plurality of openings. Furthermore, the conductive layers are provided to overlap with a region between two display elements in a plan view. Furthermore, the conductive layers included in the touch sensor are provided between two substrates included in the touch panel, and a conductive layer capable of supplying a constant potential is provided between a circuit which drives a display element and the pair of conductive layers.