PROBLEM TO BE SOLVED: To provide a hyaluronidase inhibitor that has excellent hyaluronidase inhibitory activity, and is also excellent in economical efficiency, safety, and versatility.SOLUTION: This hyaluronidase inhibitor includes low-molecular psyllium seed gum as an effective component. Preferably, in the low-molecular psyllium seed gum, the weight-average molecular weight measured by a gel permeation chromatography method is 1,000-100,000.