This checklist of Mushrooms (Basidiomycetes) in Thailand was compiled from references, specimens in museums, and brainstorming of experts. It would not have been possible without great collaboration of all the people who contributed and worked on it. We would like to take this opportunity to thank all of you. Finally, we would like to thank Office of Natural Resources and Environmental Policy and Planning and staff of Biological Diversity Division, for supporting and putting a lot of effort into this publication.