A speaker is disclosed. The speaker including a first cover, a second cover forming a receiving space, a first steel strap assembled with the first cover, a second steel strap assembled with the second cover, a sounding element accommodated in the receiving space and located between the first strap and the second strap, and a flexible printed circuit board accommodated in the receiving space. The flexible printed circuit board includes a grounding pin, a positive pin and a negative pin for transmitting audio signal. The positive pin and the negative pin are electrically connected to the sounding element. The ground pin is respectively connected to the first steel strap, the second steel strap and the sounding element. The speaker is not only simple in structure, but also has low cost.