PROBLEM TO BE SOLVED: To provide active ingredient-containing substances useful for arthritis, such as osteoarthritis, the substances being capable of daily use and having high safety.SOLUTION: The above object is solved by compositions for arthritis, compositions for joint protection, compositions for cartilage protection, collagen degradation inhibiting compositions, collagenase silencing compositions, compositions for walking function maintenance, locomotive care agents, locomotive condition-palliative agents, motor function-maintaining agents, and palliative agents of discomfort at the time of the exercise of a joint site, the compositions and agents containing Dryopteridaceae plant.SELECTED DRAWING: Figure 1
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