According to French media, police were alerted after the suspect tried to sell the six-week-old female for €10,000 ($11,470, £8,835).
He was discovered hiding in a cupboard at a neighbour's home on Tuesday, while the cub was found on a child's bed.
The animal is said to be in good health and has been handed to wildlife authorities.
According to Le Parisien, the suspect has previous convictions for theft.
Val-de-Marne : un lionceau retrouvé dans un appartement https://t.co/nOqHCwXWx1— Le Parisien (@le_Parisien) October 23, 2018