The two -- identified as Farid K and Meryem E B -- are "suspected to have provided Khalid El Bakraoui with the false documents afterwards used in preparation of the Paris attacks," a statement said.
Bakraoui blew himself up at a Brussels metro station while his brother Ibrahim and another suicide bomber attacked Brussels airport in twin attacks that killed 32 people on March 22 last year.
Some 20 people have been charged in Belgium in connection with the investigation into the Paris attacks. Investigators say the Paris and Brussels attacks were carried out by the same cell.
Meryem EB "has been charged with falsification of documents and use of false documents," it said.
Farid K has been placed in police custody while Meryem EB was released under "strict" conditions, it added.