Eraser (also known as rubber outside the United States, is the first material used) is a stationery used to remove handwriting from paper. Rubber has rubber like consistency, and has a variety of shapes, sizes and colors. Some pencils have erasers at one end. Cheaper erasers are made of synthetic rubber and synthetic soy based rubber, but more expensive or specialized erasers are vinyl, plastic or similar rubber materials.

Erasers were originally made for pencil marking, but more abrasive erasers were introduced later. The term is also used to eliminate writing on blackboards and whiteboards.