The Argentine coach has been linked with the French club for weeks, with Vincent Labrune saying the sides have now reached a "tentative" agreement.
Marseille has reached an agreement in principle to appoint Marcelo Bielsa as coach, according to club vice president Vincent Labrune.
The former Argentina, Chile and Athletic Bilbao coach has been linked to the Ligue 1 club for several weeks and it appears a contract is close to being finalized after Labrune's comments following Marseille's 0-0 draw at home to Lille on Sunday.
"We have a tentative agreement which is now subject to the drafting of contracts," he told reporters. "Without falling into absolute euphoria, we can say that we are confident that this issue will be finalized. ... I can say that we will have a great coach for next season."
Jose Anigo has been in charge of Marseille in a caretaker capacity since December, when Elie Baup was sacked. Marseille is struggling in sixth in the Ligue 1 table and appears unlikely to qualify for European soccer for next season.