Provided is an apparatus and method for sensing a three-dimensional (3D) object. The apparatus includes a display unit including a first sensing space in which a sensitivity with respect to a proximity touch is higher than a threshold value and a second sensing space in which a sensitivity with respect to the proximity touch is lower than the threshold value, on a stereoscopic space on which at least one 3D object is disposed and a controller for moving predetermined 3D objects in a predetermined direction if a proximity touch is generated on the second sensing space, detecting coordinates of a 3D object corresponding to a proximity touch generated on the first sensing space if the proximity touch generated on the second sensing space is moved and generated on the first sensing space, and performing a function corresponding to the 3D object.