The invention discloses a simple loudspeaker, comprising a shell. The key point of the technical scheme is that a washer and magnet fixed by the washer are arranged in the shell; a cavity is arranged between the shell and the washer; an inductive coil capable of carrying out reciprocating motion along the cavity is arranged in the cavity; and dustproof diaphragm capable of moving with the inductive coil is arranged on the inductive coil. According to the simple loudspeaker provided by the invention, the sound quality is high; the structure is simple; and the cost is low.