The centre in a disused railway yard near Gare du Nord station will take in 50-80 people a day -- the estimated number of migrants who arrive in Paris daily, most of whom end up sleeping rough.
They can spend up to 10 days at the site where they will receive medical care and advice on seeking asylum before being transferred to various refugee hostels.
Three Eritreans with backpacks and woolly caps were among the first to arrive at the site, where they were greeted by a "Welcome" sign in French, Arabic, Pashto, Dari and other languages.
According to the Paris town hall, 60 men were housed in the camp by yesterday evening.
Also Read
The plan is to process those in the centre quickly and move them on elsewhere to free up places for new arrivals.
The centre is made up of a giant inflatable white-and-yellow reception hall and a 10,000-square-metre (110,000 square feet) hangar with dormitories, bathrooms, a canteen and a games area. Around 500 people have volunteered to assist the 120 staff.
A separate facility for families and women will open in early 2017 in the southeastern suburb of Ivry-sur-Seine.
Unaccompanied minors will be sent to existing children's shelters around the city.
The opening of the men's centre comes a week after police cleared a camp in northeast Paris where 3,800 people -- mostly Afghans, Sudanese and Eritreans -- had been living in tents and mattresses under an elevated metro line.
Disclaimer: No Business Standard Journalist was involved in creation of this content