Chan Shih-chang held his nerve to card a closing three-under 67 at the King's Cup to claim his maiden European Tour title by two shots.
The 30-year-old from Chinese Taipei took a one-shot advantage into the final round at Phoenix Gold Golf Club in Thailand on Sunday and made six birdies to finish 12 under for the tournament, which is co-sanctioned with the Asian Tour.
Chan held off the challenge of compatriot Lin Wen-tang, while local contender Danthai Boonma was three shots back along with Englishman Mark Foster in Pattaya.
Eddie Pepperell was level with Chan on 12 under before slipping back by dropping five shots in the final four holes to end up in a tie for sixth place.
Chan said: "I was actually feeling very nervous when I started my round. I knew it would be a very close fight as there was little separating the leaders at the start of the day.
"I told myself to play my own game and not look at the leaderboard too much so that I'll not feel so nervous.
"It has always been my dream to win on the Asian Tour and I did it today.
"The future is bright and I can only look forward from here."