In an embodiment, an electroacoustic converter (earphone 100) has an enclosure 41, piezoelectric sounding body 32, electromagnetic sounding body 31, and passage 35. The piezoelectric sounding body 32 includes a first vibration plate 321 having a periphery supported directly or indirectly on the enclosure 41, and a piezoelectric element 322 placed at least on one side of the vibration plate 321. The piezoelectric sounding body 32 has a second vibration plate and divides the interior of the enclosure 41 into a first space S1 and a second space S2. The electromagnetic sounding body 31 is placed in the first space S1. The passage 35 is provided in or around the piezoelectric sounding body 32 to connect the first space S1 and second space S2. The electroacoustic converter is capable of obtaining desired frequency characteristics easily.