The present disclosure provides a dome type diaphragm, a balanced dome diaphragm, and a speaker capable of outputting sounds in a high sound area at a high sound pressure. A dome type diaphragm according to the present disclosure includes: a first part having a first curvature; and a second part that is arranged in an inner peripheral side of the first part and is integrally provided with the first part, the second part having a second curvature that is different from the first curvature.