A piezoelectric speaker and a method for forming the piezoelectric speaker are provided. The method includes: providing a piezoelectric actuator which includes a piezoelectric layer, a bottom electrode and a top electrode, wherein the bottom electrode and the top electrode are on two opposite surfaces of the piezoelectric layer; providing a speaker frame which includes a base and a bump structure on the base; forming a solder layer on a top surface of the bump structure; and combining the bottom electrode of the piezoelectric actuator with the speaker frame through the solder layer.