The present invention provides an inhibitor for inhibiting the increase of concentration of phosphorus in blood, which comprises lactic acid bacteria as the effective ingredient. The inhibitor for inhibiting the increase of concentration of phosphorus in blood of the present invention has high safety and can be easily administrated, and can sufficiently inhibit the increase of the concentration of phosphours in blood.本發明提供以乳酸菌為有效成分的血中磷濃度上昇抑制劑。本發明之血中磷濃度上昇抑制劑之安全性高且可容易投與，可充分抑制血中磷濃度之上昇。
