An electronic paper unit including a flexible substrate, a thin film transistor layer, an electronic ink layer, a waterproof layer, and a sealant is provided. The thin film transistor layer is disposed on the flexible substrate. The electronic ink layer is disposed on a surface of the thin film transistor layer. The waterproof layer is disposed on the electronic ink layer. An edge surface of the waterproof layer and an edge surface of the electronic ink layer form a side wall where there is a first acute angle or a first obtuse angle between the side wall and the surface of the thin film transistor layer. The sealant is coated and covered on the side wall and the surface. A method for fabricating the electronic paper unit is also provided.