A touch sensor includes a substrate layer, first sensing electrodes arranged on the substrate layer along a first direction parallel to a top surface of the substrate layer, the first sensing electrodes including first slits therein, second sensing electrodes arranged on the substrate layer along a second direction parallel to a top surface of the substrate layer and crossing the first direction, the second sensing electrodes including second slits therein, bridge electrodes electrically connecting neighboring ones of the first sensing electrodes, and connecting portions which connect neighboring ones of the second sensing electrodes.