To provide an inspection auxiliary tool 2 convenient for inspection of a building or the like.

This inspection auxiliary tool 2 is equipped with a connection part 4 and a display 6. The connection part 4 has a ring shape and comprises a magnet. The display 6 has a shape similar to a human hand. The inspection auxiliary tool 2 is used together with a sounding rod 10. The sounding rod 10 is equipped with a shaft 12 and a sounder 14 mounted on one end of the shaft 12. The sounder 14 has substantially a spherical shape. The sounder 14 comprises a metal attracted by the magnet. The connection part 4 is stuck to the sounder 14 by a magnetic force. A seriously damaged part of a crack 16 is shown by the display 6. A picture is photographed in this state. The seriously damaged part is specified based on the picture and repaired.