A method of providing an ultrasound image, the method including: marking a cut line or a cut surface on a 3-dimensional (3D) ultrasound image of an object which is obtained by using a probe, wherein the cut line and the cut surface are used to view a cross section of the 3D ultrasound image; detecting motion information about the probe by using a sensor included in the probe; and changing a location of the cut line or the cut surface based on the detected motion information about the probe.