Mr Chester, the Minister for Veterans’ Affairs and National Party MP for East Gippsland in Victoria, was in the chamber when he began to feel unwell.
His office told news.com.au that the 52-year-old collapsed and was assisted by fellow politicians who are also trained doctors.
Mr Chester quickly took to Twitter to address the situation, joking that “rumours of my demise have been exaggerated”.
“Thanks everyone for their kind messages of concern and the bipartisan medical team of MPs, Parliament staff and colleagues who’ve rallied to check on my welfare,” he wrote.
“I feel fine and just going to have a few tests done.”
The incident occurred while Prime Minister Scott Morrison was delivering a speech. Liberal MP Katie Allen and Labor’s Michael Freelander were the politicians who rushed to his assistance.