Family and friends hold concerns for David Stransky who was last seen more than a month ago in Miles, west of Brisbane.

A hitchhiker has been missing for more than a month in Queensland.

David Stransky, 43, was last seen on May 16 at the Caltex service station in Miles, west of Brisbane.

He was wearing a plain brown T-shirt and carrying a black duffle bag full of clothes.

Police believe Mr Stransky, from Miles, was hitchhiking or travelling by foot.

Family and friends hold concerns for him as he has not been in contact since his disappearance.