To provide a bacterium belonging to the genus Bifidobacterium which is excellent in a survival ability in the gastrointestinal tract, has an effect of inhibiting the cholesterol absorption in the intestinal tract, and is excellent in lipid metabolism ameliorating effects including decreasing the blood cholesterol level and the like, and shows a high survival rate after storage, and a cholesterol absorption inhibitor using the same. The invention provides a cholesterol absorption inhibitor containing, as an active ingredient, at least one microorganism selected from Bifidobacterium animalis subsp. animalis YIT 10394, Bifidobacterium animalis subsp. lactis JCM 1253, Bifidobacterium animalis subsp. lactis JCM 7117, and Bifidobacterium pseudolongum subsp. globosum.