Electronic paper, also called e-paper, is a display technology designed to mimic the appearance of ordinary ink on paper. Unlike a conventional flat panel display, which uses a backlight to illuminate its pixels, electronic paper reflects light like ordinary paper and is capable of holding text and images indefinitely without drawing electricity, while allowing the image to be changed later.

There are several different technologies to build e-paper, some of which can use plastic substrate and electronics, so that the display is flexible. It is considered more comfortable to read than conventional displays. This is due to the stable image which does not need to be constantly refreshed, the large viewing angle, and the fact that it uses reflected ambient light. It has a similar contrast ratio to that of a newspaper and is lightweight and durable, however it still lacks good color reproduction.

Applications include e-book readers capable of displaying digital versions of books and e-paper magazines, electronic pricing labels in retail shops , time tables at bus stations , and electronic billboards .

Electronic paper should not be confused with digital paper, which is a pad to create handwritten digital documents with a digital pen.