A plasma electrode device, a method of manufacturing plasma electrode device, and an air conditioner are provided. The plasma discharge device may include an insulating body； a discharge electrode formed in a first surface of the insulating body to generate plasma discharge； and a ground electrode formed in a second surface of the insulating body to generate plasma discharge by reacting with the discharge electrode. The discharge electrode may have a prescribed pattern having a plurality of branches, and the insulating body may include a flexible material configured to be curved at a predetermined curvature.
