A PIFA/monopole hybrid antenna includes a high-frequency radiator, a low-frequency radiator, a connecting part, a feed part, and a ground part. The high-frequency radiator includes a first radiating part and a second radiating part extended substantially perpendicular to the first radiating part. The low-frequency radiator includes a third radiating part extended substantially parallel to the first radiating part, and a fourth radiating part extended substantially perpendicular to the third radiating part. The connecting part is connected between the high-frequency radiator, the low-frequency radiator, the connecting part, the feed part, and the ground part.