Cluster state quantum dialogue is proposed, which enables both legitimate parties to exchange their 4 bit secret messages in a direct way. Compared with the there-particle W states, the shemes have following advantages. After two-step security check, four-bit secret message can be transmitted to each other by transmitting of single particle with the aid of two-bit classical information. The scheme can discard the drawback of the intercept-resend attack, the entangle-measure attack, and the optimal incoherent attack.