A controlled bidirectional quantum secure direct communication protocol without information leakage was proposed. In the proposed protocol, two authenticated communication parties, Alice and Bob, were able to securely exchange their secret messages simultaneously under the control of the controller, Charlie. The problem of information leakage was overcome by making full use of the measurement correlation property after entanglement swapping among three Bell states. Moreover, the proposed protocol merely took the Bell state as quantum resource and merely needed the Bell measurement so that it was convenient to implement. Security analysis shows that the proposed protocol can detect not only the active attacks from the outside eavesdropper, but also the dishonest behavior from the controller, Charlie. It can be concluded that the proposed protocol has good security.