Touch sensor and image display device including the same

A touch sensor, comprising:

• a substrate layer;
• sensing electrodes arranged on a top surface of the substrate layer, the sensing electrodes having boundaries in which a plurality of convex portions are connected;
• and
• a dummy electrode disposed between the sensing electrodes, the dummy electrode having a boundary in which a plurality of convex portions are connected,
• wherein the sensing electrodes comprise a first sensing electrode arranged in a column direction and a second sensing electrode arranged in a row direction;
• and
• a convex portion in a region where the first sensing electrode, the second sensing electrode and the dummy electrode are adjacent to each other has a radius of curvature less than that of a convex portion in a region where only two of the first sensing electrode, the second sensing electrode and the dummy electrode are adjacent to each other,
• wherein the dummy electrode comprises a first dummy electrode disposed between the first sensing electrode and the second sensing electrode neighboring each other, and a second dummy electrode surrounded by four sensing electrodes of the sensing electrodes.