A cooking appliance may include a panel provided with a through hole; a knob assembly installed at the panel; and a valve disposed inside of the panel. The knob assembly may include a shaft that passes through the through hole, configured to move in an axial direction between a first axial position and a second axial position and rotate around a rotational center; a knob disposed outside of the panel, connected to the shaft, and configured to move with the shaft in the axial direction and rotate with the shaft; a frame installed at the panel and configured to support rotation of the shaft; a rotational member connected to the shaft, configured to move and rotate with the, and having a diameter larger than a diameter of the shaft; a first rotation limiting portion provided on the frame at a first circumferential position; a second rotation limiting portion provided to the rotational member at a second circumferential position, engaged with the first rotation limiting portion at the first axial position and interfering therewith in the circumferential direction in a state in which the first circumferential position and the second circumferential position correspond to each other, and disengaged from the first rotation limiting portion at the second axial position and not interfering therewith the circumferential direction; and an elastic member configured to elastically support the shaft.