Provided is a lower-profile multi-band antenna. According to one embodiment of the present invention, there is provided an antenna including a linear first antenna portion, a conductive portion that connects the first antenna portion with a power feeding point, grounding regions where opposite ends of the first antenna portion are short-circuited and grounded, and a second antenna portion, at least a part of which overlaps with the conductive portion with a dielectric substance interposed between the conductive portion and the second antenna portion. The second antenna portion is disposed in a region surrounded by the grounding regions and the first antenna portion. The conductive portion may be connected to the first antenna portion at a middle point between the opposite ends of the first antenna portion.