Craig Rochus and his 15-year-old son, William, were last seen at their Cass Street home in Rosebud on Tuesday 17 May just before 1.30am.
Police and family members are concerned for the welfare of the pair as Craig has not picked up his medication and it is believed they have no personal belongings with them.
The 49-year-old’s car is also missing; a champagne coloured Mitsubishi Verada sedan with registration number OFO156.
Police have released a picture of Craig and William in the hope it will assist in locating them.
Anyone who sees Craig or William and or their champagne Mitsubishi is urged to contact Rosebud Police on 5986 0444.
