"When nobody moved the driver got up and said: 'Terminus! Everybody off the bus!'
"After that the driver came to see me and said, 'you and your helper, you can get on, and the others, you can wait for the next one!'"
Speaking to France's Huffington Post, he said the bus driver had told him that "everyone might need a wheelchair one day".
After waiting for passengers to disperse he had come down to talk to Mr Le Berre and his brother and tell them they could get on the bus.
The driver did not know him and had no disabled family members but had simply chosen to show "a little civility", he said.
A group called Accessible Pour Tous - meaning Accessibility For All - shared the touching story on Twitter.
Paris's bus company asked for details so they could pass the group's good wishes on to the driver.
The tweet has been retweeted more than 5,000 times and liked more than 10,000 times and many users praised the driver's intervention.
One said: "The bus driver is a hero!", while another wrote: "Congratulations to the bus driver, but shame on the passengers".
Another user said: "Bravo to the driver who emptied his bus to allow the disabled person to get on.
"Good lesson. I hope the other passengers understood."
A further comment read: "I hope this action will be followed by lots of others. Let's change the view of those who don't see others."