Police Scotland is appealing for information regarding the whereabouts of 50-year-old prisoner James Casey.
Casey failed to return to HMP, Castle Huntly by Dundee following a period of day release.
The prisoner was reported missing at 9pm on Thursday December 10.
It is understood he may have travelled to Inverness.
He is described as being five feet eight inches tall, with receding hair and brown eyes. When last seen he was wearing a blue coat, black hooded top, blue jeans and brown walking boots.
If seen, members of the public should not approach him and should contact Police Scotland on 101.
Anyone wishing to provide information anonymously can do so through the charity Crimestoppers on 0800 555 111.