A composition which is obtained by causing a specific compound to be present together with sucralose. The composition provides a sucralose in a stable form, more particularly, a sucralose which is still stable and thus is significantly suppressed with respect to the decrease in sweetness and discoloration (browning, blackening), even when it is subjected to a warming treatment under a condition wherein temperature is high and especially water content is low and/or pH is low. The stabilized sucralose-containing composition can be used as a sweetener by itself and as a compound with a food or a drug.