The Altona Meadows retiree got the wonderful news when he was doing his grocery shopping at Central Square Shopping Centre in Melbourne's north yesterday.
He held the ticket for one of three division one winning entries in TattsLotto draw 4195 on Saturday.
The man said he absolutely didn't expect the win.
"I thought, 'come one, you're joking'," he said.
"This is a big surprise.
"I've been playing TattsLotto for so long. It's a great pleasure to finally win."
And he has humble plans to spend the cash.
"I'm going to treat my family. They're very important to me. I'll pay off my house and then give some to my children and grandchildren."
The man's winning entry was the third division one winner at the Altona Meadows Central Lotto store this year.
Central Lotto owner Bruce Zheng said the win wasn't only great for the winner, but also for his team "and the local community, especially during this tough time".
"We would love to send our best wishes and congratulations to our winner and their family. We hope this great winning helps them enjoy a wonderful life," Mr Zheng said.