A　quasi-secure　quantum　dialogue　protocol　using　single　photons　was　proposed.　Different　from　the　previous　entanglement-based　protocols,　the　present　protocol　uses　batches　of　single　photons　which　run　back　and　forth　between　the　two　parties.　A　round　run　for　each　photon　makes　the　two　parties　each　obtain　a　classical　bit　of　information.　So　the　efficiency　of　information　transmission　can　be　increased.　The　present　scheme　is　practical　and　well　within　the　present-day　technology.