Financial Secretary John Tsang will attend the Group of Twenty Leaders' Summit in Turkey on November 15 and 16.
Mr Tsang will join the summit in Antalya as part of the People's Republic of China delegation.
Leaders of major economies will discuss a wide range of global issues at the meeting.
Mr Tsang will also meet Turkish officials.
He will then visit Bucharest on November 17 and 18 to strengthen economic and trade ties between Hong Kong and Romania.
Mr Tsang will return to Hong Kong on November 20. Secretary for Financial Services & the Treasury Prof KC Chan will be Acting Financial Secretary while Mr Tsang is away.
