Provided is an MEMS microphone having a piezo diaphragm. The MEMS microphone having the piezo diaphragm comprises a cover combined to a substrate to form an internal space; a transducer combined to an upper part of the substrate, disposed in the internal space, and converting an external sound, which comes in through a sound passing hole, into an electrical signal; and a semiconductor chip combined to the upper part of the substrate, electrically connected to the transducer, and amplifying the converted electrical signal to be converted into an analog or a digital electrical signal. The diaphragm disposed inside the transducer is formed with a piezoelectric element, and is characterized by having a vent hole formed thereon.
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