A good hair day for Poulter in Nordic Open
Poulter carded a final round 66 for a 22-under-par total of 266, one shot ahead of former European number one Colin Montgomerie.
The Scot had a chance to force a play-off on the last but left his birdie putt short from 15 feet while playing partner Soren Hansen birdied the last three holes to claim a share of third with Montgomerie's compatriot Stephen Gallacher and France's Gregory Havret.
Poulter, who had red streaks in his hair during his Celtic Manor Wales Open win earlier this year, arrived in Denmark sporting a bizarre style with blond and dark brown stripes.
But his golf was equally eye-catching as he carded four rounds in the 60s, and he said: "It was nice to let the golf actually do all the work and stop people talking about the hair."
Poulter collected the first prize of £187,000 for his fifth tour title, and with it a timely confidence boost for the USPGA Championship at Oak Hill the final major of the year which begins on Thursday.
"I have massive expectations of the USPGA now," he added.
"I'm very, very confident the way I played this week.
"I really hit some fantastic shots all week and very few off line. Obviously the course next week is going to be a lot tougher, but if I keep hitting the middle of the fairways and holing some putts I'm really looking forward to a big couple of weeks.
"I came here after eight days without touching a club and hit it badly on Monday, rustily on Tuesday and started to get the feeling back on Wednesday. It shows all the work I've been doing with David Leadbetter is paying off."
Poulter's win also paid off for a local woman who had bet 1,000 Danish Kroner (approx. £100) on him at odds of 22/1 at the start of the week.
"I was having dinner last night in an Italian restaurant when she just passed me this betting slip and said 'You had better win'," revealed Poulter, before dashing to catch his flight to America.
The 27-year-old began the day one shot off the pace, but birdies at the second and eighth got him into a tie for the lead alongside Brian Davis and Montgomerie.
That duo both then bogeyed the ninth, and Poulter's birdie from four feet on the 11th briefly took him two ahead of the field.
The gap was quickly closed to a single shot. But Poulter doubled it again with two putts for birdie on the par-five 12th. Then when Montgomerie again got within a shot his sixth birdie of the day on the 15th took Poulter two ahead again.
Montgomerie closed the gap to one shot once more with a birdie on the 17th - and with Poulter failing to birdie either of the closing par-fives for the third day out of four, the 40-year-old Scot had a chance to force extra holes.
His drive almost found a fairway bunker, however, and he was unable to reach the green in two his pitch coming up 15 feet short and the putt never threatening the hole.
Montgomerie, playing his first event since being forced to pull out of the Open after seven holes of his first round with a hand injury, said: "I didn't quite get the momentum and didn't have the feel with the putter. I left too many short this week, including the one on the last for a tie.
"But it's coming back and it's good after three weeks off that I've competed well. It's a good start to the back end of the year because the front end did not exist.