Adsorption　kinetics　of　Gemini　surfactant　C12-2-E　x-C12·2Br　(x　=　1,　2,　3)　at　the　water-air　interface　was　studied　by　maximum　bubble　pressure　technique.　The　kinetics　effect　of　adsorption　was　enhanced　when　the　bulk　concentration　or　the　temperature　was　increased　because　the　surfactant　molecules　moved　faster　from　the　bulk　to　the　surface.　Since　the　molecules　with　short　spacer　chains　were　easy　to　pre-aggregate　as　compared　with　those　with　long　spacers,　the　concentration　of　mono　molecules　of　the　latter　in　the　bulk　was　higher　than　that　of　the　former,　which　promoted　the　diffusion　of　the　former　molecules　to　the　surface　in　the　short　time　and　decreased　the　γt　more　quickly.　However,　in　the　long　time　as　the　surface　was　nearly　completely　covered,　the　γm　of　surfactant　with　long　spacer　was　high　because　this　kind　of　molecules　occupied　large　surface　areas　resulting　in　less　endmost　methyls　of　them　protruding　into　the　air.　Compared　with　the　conventional　surfactant　C12TABr　which　had　the　same　kind　of　head　group　and　the　same　length　of　hydrophobic　chain　as　C　12-2-Ex-C12·2Br,　the　latter　seemed　more　favorable　to　adsorb　at　the　surface　than　the　former.