Abstract: A finger brush, which is an illustrating tool, includes a brush tip portion for illustrating and a main body portion. The main body portion is in a hollow elongated shape having one end supporting the brush tip portion and the other end receiving a finger inserted therein. In the main body portion, a slit extending in the axial direction of the main body portion and reaching the other end is formed. The main body portion has a tapered portion having a cross-sectional area getting smaller toward the other end in the axial direction of the main body portion. A finger inserted into the main body portion forces the tapered portion to spread out, causing the finger to be secured inside the main body portion. Such a configuration can provide an illustrating tool which is worn on a finger and can provide a good sense of wearing without compromising a sense of unity with a finger.