This was revealed last week by Speaker Job Pomat, who said these numbers had been recorded since a compulsory Covid-19 test site had been established at Parliament's entrance, as recommended by pandemic controller David Manning.
All those testing positive had been sent home to isolate. The infected included six political staff and 18 parliamentary services staff members.
He said they never realised their status until tested at the Parliament premises, The National newspaper reported.
Pomat told MPs that every staff member, including political staff members, would be asked for a Covid-19 test result before entry or otherwise would have to be tested each time they entered Parliament.
Meanwhile, Port Moresby General Hospital CEO Dr Paki Molumi has urged everyone to get vaccinated as he recovers from Covid-19 himself.
He said since September, 200 hospital staff had contracted Covid-19 and that 70 to 80% of medical staff had been vaccinated and just 30% of the nursing staff.
Molumi said the intention was to get 100% of the nursing staff vaccinated.