To provide a primary sound pressure gradient type dynamic microphone unit which is excellent in high-pass characteristics by shortening distance between sound terminals in a simple configuration.

The dynamic microphone unit comprises: a diaphragm 10 having a voice coil 13; a magnetic circuit part 20 having a magnetic gap G for the voice coil 13; and a bottomed cylindrical unit case 30. In the dynamic microphone unit, the magnetic circuit part 20 is supported in the opening of the unit case 30, a peripheral part 12a of the diaphragm 10 is supported in the peripheral portion of the opening of the unit case 30, a resonator 40 having a front part acoustic terminal 40a covers the front side of the diaphragm 10, and a back air chamber 30A of a predetermined capacity is provided in the unit case 30. A rear part acoustic terminal 310a which makes an acoustic wave act on the back side of the diaphragm 10 is provided between the peripheral part 12a of the diaphragm 10 and the peripheral portion of the unit case 30 which supports the peripheral part 12a.