A　scheme　is　discussed　for　probabilistic　teleportation　of　a　special　type　of　two-atom　pure　state　-　an　arbitrary　superposition　of　symmetric　two-atom　Dicke　states.　The　scheme　follows　the　previous　idea　[S.B.　Zheng,　Phys.　Rev.　A　69　(2004)　064302],　which　is　proposed　for　approximate　and　probabilistic　teleportation　of　an　atomic　state　through　only　a　detection　on　the　sender　atom.　In　principle,　the　present　scheme　can　achieve　faithful　teleportation　by　resorting　to　a　very　different　model,　which　depicts　the　resonant　interaction　of　a　Λ-type　three-level　atom　with　a　two-mode　cavity　field.　The　scheme　can　also　be　used　for　teleportation　of　an　arbitrary　superposition　of　symmetric　multi-atom　Dicke　states.　©　2008.