We　present　an　efficient　scheme　for　undeniable　five-party　quantum　state　sharing(FQSTS)　of　an　arbitrary　single-atom　state　with　a　five-atom　cluster　state　in　cavity　QED.　The　implementation　of　this　scheme　does　not　involve　the　joint-state　measurement　of　multi-atoms,　which　makes　it　convenient　in　a　practical　application.　The　scheme　is　also　insensitive　to　the　cavity　decay　and　the　thermal　field.