To evaluate the effect on bowel movements of ingesting a powdery supplement containing multiple oligosaccharides as a principal ingredient one package（5 g in powder）once a day for two consecutive weeks for healthy male and female aged 20 to 59 years old who are mild constipation tendencies with 3 to 5 defecation frequency per week, a randomized, double-blind, placebo-controlled, crossover, comparative study was conducted. As a result of conducting a defecation survey（bowel movement and fecal property）, improvement action of defecation amount and frequency was observed. There were no side effects or adverse events during the test period in adverse event survey, so the safety of powdery supplement containing multiple oligosaccharides as a principal ingredient was confirmed.