PROBLEM TO BE SOLVED: To provide an oral ingestion agent or the like capable of preventing and/or improving functional gastrointestinal disorders for both persons positive to and persons negative to pylori.SOLUTION: A functional gastrointestinal disorders prevention and/or improvement agent is for persons positive to and persons negative to helicobacter pylori, and contains lactic acid bacterium as an active ingredient. It is preferable to use a genus Lactobacillus lactic acid bacterium as a lactic acid bacterium, and it is more preferable to use Lactobacillus gasseri OLL 2716 (FERM BP-6999).SELECTED DRAWING: None
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