Eyeliner pen is a kind of cosmetics product, which is used to deepen and highlight the makeup effect of the eyes and make the eyes energetic. It looks like a pencil. A special pencil sharpener or knife can be used to remove excess wood, and the thickness of the pen head can also be increased.

Eyeliner pen is divided into pencil type and automatic pencil type. It is soft to use around the eyes. Some eyeliner pens with slightly hard texture have the effect of maintaining makeup for a long time. They are dark in color, and can be used to lengthen the eye tail. They are often used for drama and stage makeup.