This research attempts to identify the issues which make it more difficult to safeguard transboundary protected areas in the ASEAN countries. The research has found that national forest law, which relates only to the territory of each country, is not sufficient to safeguard the transboundary protected areas that spread across the boundaries of two or more countries. There is no national law, regional convention, or bilateral agreement among the ASEAN countries which directly provides for the conservation of transboundary protected areas. This author has adopted a legal approach to the protection of transboundary protected areas in Europe and has proposed that a regional convention or agreement should be used as an instrument to promote cooperation and sustainable management for the conservation of transboundary protected areas and to deal with problems that do not stop at national borders. The relevant domestic laws should be consistent with such a prospective regional convention or agreement.

1. Introduction
2. The EU Approach
3. The Appropriate Approach for Thailand andother ASEAN countries
    A. The Need for a Regional Convention for ConservingTransboundary Protected Areas
    B. Additional Measures Required for the Conservation ofTransboundary Protected Areas
4. Recommendations
    A. Recommendation 1
    B. Recommendation 2
    C. Recommendation 3
5. Conclusion

• Patrawan Rattanakaset(Assistant Professor of Law at University of Phayao, Thailand. Docteur en Droit)