Police report that on October 19 at around 3pm at Tari Block, Hohola 5, the suspect used a big rock and allegedly hit the victim on his head several times.
The victim fell unconscious as a result of the attack and has been in hospital since.
Police say the victim has a fractured skull and was admitted to the Port Moresby General Hospital.
The suspect is still at large and will most likely face charges of grievous bodily harm.
Police are now working on leads to establish his whereabouts.