Police hold welfare concerns for a missing man who was last seen about a month ago.

Trevor Beasley, known to his friends as Rocky, was last seen in the Coolgardie area on February 2.

He may be travelling to Mount Isa or Victoria in a white 1998 Toyota Camry, registration 1DCE 082.

He is described as being about 181cm tall with a slim build, dark skinned with brown hair and brown eyes.

Police said concerns were held for his welfare, and anyone with information have been asked to contact Crime Stoppers on 1800 333 000, or contact police directly on 131 444.