To provide a guiding auxiliary tool for vertically drilling at an objective position on an article which can be easily drilled by an electric drill.

A large number of holes 2 having different diameters are vertically drilled on a main body 1, and funnel-shaped expanded portions 3 overlapping with adjacent holes are formed at a bottom portion of the holes 2. Expanded portion toward a bottom edge 4 is formed on a side surface of the main body 1, and lines 5 vertically extending from the centers of holes 2 to the side surface of the main body 1 are drawn on an upper surface and down to the bottom edge 4 of the four surfaces of the main body 1. A handle 6 is provided on an upper part of one end with large diameter holes 2 side of the main body 1.