Physical and chemical properties of glycosylsucrose were characterized as follows: 1. The moisture content of glycosylsucrose syrup (35%, w/w) was 63.6% and total sugar in solid was 35.9%. 2. Main sugar compositions of glycosylsucrose syrup were maltotetraose 54.5%, sucrose 18.0%, glycosylsucrose 15.3%, maltosylsucrose 11.3% and the content of glucose, maltose, maltotriose and fructose were very little. 3. Perceived sweetness threshold of glycosylsucrose was 0.71%, relative sweetness was 0.53, and sweetness intensity expressed as power function was S=0.78℃^(1.5). 4. Viscosity of glycosylsucrose was higher than that of sucrose and Japanese product at 10, 25, 35 and 65℃. 5. The content of water absorption of gylcosylsucrose at Aw 0.80 was 0.48g H₂O/g dry weight while that of sucrose was 0.17 g H₂O/g dryweight at Aw 0.86. 6. The stability of glycosylsucrose was decreased by acidic pH, high temperature and long heating time. 7. The glycosylsucrose showed very little browning when heated with pepton, but alkaline pH (pH8), high temperature and long heating time increased browning reaction.