The new prime minister of Poland, Leszek Miller, will visit Russia in mid-December. His trip will be a part of the preparations for the official visit of the Russian president Vladimir Putin to Poland, Polish Ambassador to Moscow Andrzej Zalucki, told RIA Novosti. Mr. Putin's visit will be the first official visit of a Russian leader to Poland in the last eight years. The meeting of the co-chairmen of the bilateral commission on trade and economic cooperation will also be held in December. According to the Polish diplomat, the meeting and the Polish prime minister's visit will allow the two sides to prepare all issues of economic cooperation for Mr. Putin's visit.