A cooking appliance includes a shaft protruding to an outside of a control panel; a knob installed in a way that encircles an outside of the shaft protruding to the outside of the control panel; a knob ring disposed between the control panel and the knob, and configured to guide a rotation of the knob; a supporter disposed between the knob and the knob ring, and shaft-coupled to the shaft to connect the knob and the shaft; and a support part disposed between the knob ring and the supporter and configured to narrow a gap between the knob ring and the supporter, or disposed between the knob ring and the knob and configured to narrow a gap between the knob ring and the knob.