Canterbury Police are calling for sightings of Rhys Hunter Williams who has been missing for over a week.
Rhys was last seen on May 10 and his disappearance is out of character, police said.
He may be travelling in a green Toyota Corona, registration number TK6404.
The 42-year-old Leeston man is of medium build and is 175cm tall.
Police have concerns for his wellbeing due to the time he has been missing.
Anyone who has seen Rhys in the last week is asked to contact police immediately on 03 363 7400 quoting file number 170513/4498.