An apparatus to isolate vibration during printing by a printer of a computer or a word processor, including vibration control swingable devices provided at their bearing portions, where the printer is mounted, with concave-surface bases extending in parallel to a direction of movement of a printing head of the printer and with rollers connected to the bearing portions which operate rolling motion on the concave-surface bases. The vibration control swingable devices may also include swing mounts for swinging the bearing portions in parallel to the direction of movement of the printing head. Thus, the vibration caused by the printer during printing can be isolated from other associated instruments.