An electroacoustic transducer includes a diaphragm having a center dome and a sub dome connectingly provided around the center dome, and a unit frame for oscillatably supporting the diaphragm. The sub dome is formed with a flat flange part at the peripheral edge thereof, and the unit frame is formed with a flat support face facing the flange part. The flange part is attached to the support face via an adhesive. The bonding area of the support face and the flange part increases gradually from an inside end of the support face to an outside end thereof. The support face may include a plurality of first bosses arranged at predetermined intervals along the inside end thereof, and a plurality of second bosses each having a diameter larger than that of the first boss arranged at predetermined intervals on the outside of the first boss group.