BackgroundThe　stigma　of　internet　surfing　is　a　relatively　new　area　of　study　arising　from　the　popularity　of　the　internet.　The　Questionnaire　on　the　Internal　Stigma　of　Internet　Surfing-9　(QISIS-9)　was　developed　for　the　Chinese　culture,　so　its　suitability　for　use　in　other　cultural　contexts　is　uncertain.　This　paper　examines　the　measurement　invariance　of　the　QISIS-9　among　Sino-Australian　undergraduates　to　verify　the　cross-cultural　measurement　invariance　of　QISIS-9　and　promote　cross-cultural　(nationality)　research　regarding　the　internal　stigma　of　internet　surfing.　MethodsThe　Internal　Stigma　of　Internet　Surfing-9　(QISIS-9)　was　used　to　assess　200　Chinese　undergraduates　(50%　female,　M-age　=　19.78)　and　204　Australian　undergraduates　(76%　female,　M-age　=　21.10),　respectively.　ResultsA　confirmatory　factor　analysis　(CFA)　indicated　that　the　single-factor　model　of　QISIS-9　is　acceptable　with　both　Chinese　and　Australian　undergraduates.　However,　the　factor　loading　of　Item　9,　to　which　a　reverse　score　is　assigned,　is　not　ideal　for　both　samples.　Thus,　the　item　should　be　deleted.　According　to　a　multigroup　confirmatory　factor　analysis　(MCFA),　QISIS-8,　the　revised　version　of　QISIS-9,　meets　the　strict　measurement　invariance　among　the　Chinese　and　Australian　participants.　The　QISIS-8　demonstrated　appropriate　internal　consistency　in　the　scores　for　both　the　Chinese　and　Australian　undergraduates.　ConclusionThe　new　QISIS-8　can　effectively　assess　the　internal　stigma　of　internet　surfing　among　Chinese　and　Australian　undergraduates,　and　it　provides　a　frame　of　reference　for　further　cross-cultural　(border)　comparisons.