In cathode-ray tubes provided with an antenna getter on an electron-gun structure, a cathode-ray tube having antenna getter structures so improved in construction that, when the electrongun structure is advanced for insertion into said cathode-ray tube, there will be eliminated contact between the getter structures and a conductive coating on the inner surface of the tube wall, thereby to protect the conductive coating from coming off or being damaged, whereby deterioration in the innerelectrode insulation due to release of fine particle of the coating into the tube and the consequent in-tube discharge phenomenon may be prevented.