The　proposed　quantum　identity　authentication　schemes　only　involved　authentication　between　two　communicators,　but　communications　with　deniability　capability　are　often　desired　in　electronic　applications　such　as　online　negotiation　and　electronic　voting.　In　this　paper,　we　proposed　a　quantum　deniable　authentication　protocol.　According　to　the　property　of　unitary　transformation　and　quantum　one-way　function,　this　protocol　can　provide　that　only　the　specified　receiver　can　identify　the　true　source　of　a　given　message　and　the　specified　receiver　cannot　prove　the　source　of　the　message　to　a　third　party　by　a　transcript　simulation　algorithm.　Moreover,　the　quantum　key　distribution　and　quantum　encryption　algorithm　guarantee　the　unconditional　security　of　this　scheme.　Security　analysis　results　show　that　this　protocol　satisfies　the　basic　security　requirements　of　deniable　authentication　protocol　such　as　completeness　and　deniability　and　can　withstand　the　forgery　attack,　impersonation　attack,　inter-resend　attack.