A Long Island businessman claims his partner’s son ousted him from the family company to protect his own inheritance, according to a $15 million lawsuit.

Elan Oved, who owns a clothing manufacturer, and his longtime pal, Louis Wiener, each took a stake in the other’s businesses in a 2011 deal that Oved claims threatened Wiener’s son, Daniel.

Oved’s 10 percent stake in Wiener’s Lone Star Equities, a real-estate company, prompted Daniel to see Oved “as a potential rival,” according to the Brooklyn federal court lawsuit Oved filed against Daniel Wiener.

Wiener “set out to sabotage the relationship between his father and Elan Oved,” Oved claims in the lawsuit, charging that the man removed company files and “froze” him out of the business.

Wiener could not be reached for comment.