A problem of the over-use in the natural park causes not only uncomfortable use but also has bad influence for the landscape and ecosystem. We discuss a user fee's effect, especially the effect to the over-use controls. Willingness to Pay (WTP) for a recreational use is estimated by contingent valuation survey for our case study area, Uryunuma mire. Split sample comparison between two elicitation method, payment card and dichotomous choice, is analyzed. The estimated WTPs by payment card are 500 yen for median and 453 yen for mean. The estimated WTPs by dichotomous choice are 2, 186 yen for median and 3, 322 yen for mean. Our results shows that user fees can reduce the over-use, and visitors who came from far away, had a knowledge about flowers, and had known the that fee have a large WTP.