The invention relates to an antenna arranged on a mobile terminal. The mobile terminal comprises a radiating part and a circuit board. The circuit board comprises a side edge and a grounding layer. The radiating part is separated by an insulating gap into a feed branch and a parasitic branch. The circuit board and the radiating part form a gap through enclosing. The feed branch extends to the gapwith a feed branch body for feeding the antenna, and the parasitic branch extends to the gap with a grounding branch electrically connected with the grounding part. The antenna excites a current looparound the gap on the ground parting, the feed branch and the parasitic branch. The antenna forms resonance at the position where the induced current is high so as to ensure that the communication signal has higher power, the efficiency attenuation of the antenna can be controlled when the mobile terminal is in the head-hand mode and a better communication effect can be maintained.