Provided is an ignition device of a burner which allows the burner to stably ignite even when a portion of the burner member is damaged, the ignition device including: a plate-shaped sparker disposed in an upper central region of a burner head so as to realize ignition to burn the gas ejected from the burner head and having a plurality of ignition portions formed therein; and a supporting member which has one end inserted in a center of the sparker and the other end inserted in a central region of the burner head such that the sparker is disposed in the upper central region of the burner head.