"I am happy to welcome Belarus President Alexander Lukashenko on his official visit to Ukraine," Poroshenko wrote.
The two leaders are expected to make a statement for the press after the talks.
The press service of Belorussian president reported earlier that the meeting between two presidents on July 21 will include a one on one talk and a broader meeting.
Among the topics for the discussion is settling of the Donbas conflict. Lukashenko and Poroshenko will discuss the situation in the region and exchange opinions regarding international issues.
Photos by presidential press service