MOSCOW — The prime minister of Georgia resigned on Wednesday, citing disagreements with Bidzina Ivanishvili, the founder of the governing party and the country’s richest man.

The resignation of Prime Minister Giorgi Kvirikashvili was announced in the wake of a series of antigovernment protests that have disrupted Tbilisi, the capital.

“We have had a number of fundamental disagreements with the party’s leader over the past months,” Mr. Kvirikashvili, who has headed the government since 2015, said in a televised briefing, without going into details. “Today is the moment when the party’s chairman should have the opportunity to form a team on the basis of his own views.”

In May, Mr. Ivanishvili announced his return to politics in Georgia, a former Soviet republic in the southern Caucasus Mountains between Russia and Turkey. Mr. Ivanishvili, a businessman, was elected chairman of the governing Georgian Dream party, which he had founded.