A multi-band antenna suitable for an electronic device is provided. The electronic device has a metal shell. The multi-band antenna includes a ground portion, a radiating portion and a feeding portion. The ground portion has a ground plane. The radiating portion has at least one radiating section and a short-circuit section. An extending direction of the radiating section is parallel to the ground plane. The short-circuit section is electrically connected between the radiating section and the ground plane. The ground portion is adapted to obstruct a path between the metal shell and the radiating section. The feeding portion is electrically connected to the radiating section.