He will then attend the football tournament's inaugural match on Thursday, pitting Russia against his longtime backer, Saudi Arabia.
Riyadh has been a key ally of Hariri for years, but the relationship appeared to falter in late 2017 when Hariri announced his surprise resignation during a trip to the kingdom.
He subsequently rescinded the decision and in May was appointed for a new term as prime minister following parliamentary elections.
He is now in talks to form a coalition government.
Hariri, 48, met Putin in the Russian Black Sea resort of Sochi in September 2017.
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![Russian Deputy Defence Minister, Timur Ivanov [PhotoNews Pakistan]](data:image/svg+xml;charset=utf8,%3Csvg%20xmlns%3D'http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg'%20width%3D'300'%20height%3D'172'%20data-ring-placeholder%3D'1'%3E%3C%2Fsvg%3E "Russian Deputy Defence Minister, Timur Ivanov [PhotoNews Pakistan]")
