A flexible touch panel is provided. Both reduction in thickness and high sensitivity of a touch panel are achieved. The touch panel includes a first flexible substrate, a first insulating layer over the first substrate, a transistor and a light-emitting element over the first insulating layer, a color filter over the light-emitting element, a pair of sensor electrodes over the color filter, a second insulating layer over the sensor electrodes, a second flexible substrate over the second insulating layer, and a protective layer over the second substrate. A first bonding layer is between the light-emitting element and the color filter. The thickness of the first substrate and the second substrate is each 1 μm to 200 μm inclusive. The first bonding layer includes a region with a thickness of 50 nm to 10 μm inclusive.