To provide a personal tool for storing a helmet and a safety belt which is usable even when using a rental condominium and apartment house where a helmet storage tool using the wall surface is not usable as a construction office.

The storage tool 1 is fixed on a leg arm part of a chair, a circular hole 6 is bored on one side of the storage tool 1, the helmet is placed with its top part down, and a dust prevention lid is placed inside the stored helmet. In the personal tool for storing a helmet and a safety belt, a deep-saucer-shaped hollow 9 is provided on the other side and a safety belt for preventing fall from a height is rolled up and stored.