An electronic device including a cover and a stretchable sensing unit is provided by the present disclosure. The cover has a curved surface, the curved surface has a first region with a first Gaussian curvature, and the first Gaussian curvature is not equal to zero. The stretchable sensing unit is attached to the cover, wherein the stretchable sensing unit includes a stretchable substrate and a first sensing element disposed on the stretchable substrate. The first sensing element is disposed between the first region of the curved surface and the stretchable substrate.