An electroacoustic conversion device according to one aspect of the present disclosure includes: a diaphragm; an inner voice coil attached to the diaphragm; an outer bobbin disposed in a periphery of the inner voice coil to surround the inner voice coil; an outer voice coil attached to the outer bobbin; a magnetic circuit; and a frame that holds the diaphragm and the magnetic circuit. The outer bobbin includes a plurality of wiring portions in which a pair of inner signal lines are arranged penetrating through, the plurality of wiring portions being hole shaped or notch shaped, the pair of inner signal lines being signal lines of the inner voice coil.