This waterproof microphone device includes a plurality of microphones, a housing, and a plurality of air-impermeable cover members. The plurality of microphones pick up sound wave and output an audio signal. The housing individually houses the plurality of microphones. The housing includes a plurality of holes. The hole guides sound wave to the microphone. The plurality of air-impermeable cover members are mounted on the housing. The air-impermeable cover member seals off the hole.