The ultrasonic transducer device in accordance with the present invention includes a body unit and a fixing member. The body unit includes a housing including a space which is in a front surface of the housing and is for receiving an ultrasonic transducer, and a clip part provided to a side surface of the housing. The fixing member includes a fixing plate including a fixing surface to be attached to a rear surface of an exterior panel of a vehicle, and a through hole to communicate to an opening in the exterior panel, and an interlocked part removably connected to the clip part so that the space faces the through hole. The clip part includes an interlocking part, and a spring part keeping the interlocking part in a position in which the interlocking part is physically connected to the interlocked part.