PURPOSE: To provide a hole-making apparatus by means of which a plurality of holes can be made in a short time without giving a large trouble to users of a building caused by a hitting sound and a hitting vibration.

CONSTITUTION: A supporting plate 3 is arranged on the floor 2 of a basket of an elevator and a suction fixing device 5 is fixed on this supporting plate 3 and the second supporting pole 8 which is movable in the axial direction of the first supporting pole 6 and movably crosses this first supporting pole 6 toward the face 7a to be perforated of the inner wall 7 of an elevator tower, is supported on the first supporting pole 6 stood on the suction fixing device 5. At the same time, a core drill device 9 is mounted movably on the second supporting pole 8 in its axial direction so as to easily form a plurality of holes by operating the elevator and changing the position of the core drill apparatus 9 to the first supporting pole 6 and the second supporting pole 8.