Lincolnshire Police are appealing for help to find missing 15-year-old Alex Ridley.
Alex went missing from North Somercotes on Friday, September 16, and has not been seen since.
He has been missing before and was found in Grimsby, where he has friends.
Alex is 5ft tall, of slight build, and was wearing black tracksuit bottoms, a black coat and a black beanie hat.
Officers are appealing for Alex to get in touch with someone to let them know he is safe and well.
Anyone with information on his whereabouts should contact 101, quoting incident 424 of September 16.