We　explored　the　stability　of,　and　between-group　differences　in,　the　implicit　self-esteem　of　Internet-addicted　and　Internet-nonaddicted　college　students　in　China.　Internet　addiction　was　assessed　using　Young’s　Internet　Addiction　Scale　and　the　participants　comprised　52　Internet　addicts　(26　men,　26　women)　and　52　Internet　nonaddicts　(26　men,　26　women).　We　then　used　the　Implicit　Association　Test　to　assess　levels　of　implicit　self-esteem,　employing　a　2　(addiction,　nonaddiction)　×　2　(positive　feedback,　negative　feedback)　between-subjects　factorial　design.　The　pretest　implicit　self-esteem　level　of　the　Internet-addicted　group　was　significantly　higher　than　that　of　the　control　group;　however,　the　implicit　self-esteem　levels　of　both　groups　were　unstable.　Positive　feedback　did　not　change　the　level　of　implicit　self-esteem　of　the　Internet　addiction　group.　In　future　studies　researchers　need　to　pay　more　attention　to　the　measurement　of　implicit　self-esteem,　long-term　stability,　and　addiction　to　online　games.　©　2017　Scientific　Journal　Publishers　Limited.　All　Rights　Reserved.