"We are already helping the residents of Donbas, first of all with humanitarian aid. I believe that Russia won't stand on the sidelines and will of course help rebuild Donbas, but this will be a large and common task for both Russia and Ukraine," Duma Speaker Sergei Naryshkin told journalists.
He added that he hoped "European partners would also join" in rebuilding the eastern regions of Ukraine.
Ukraine has been embroiled in an internal armed conflict since April 2014, following the launch of a military offensive by Kiev authorities against independence supporters in the southeastern regions of the country.
The months-long fighting has resulted in the destruction of important infrastructure, shortages of food, drinking water and electricity in Donbas. The region is virtually on the verge of a humanitarian disaster.
Since last August, Russia has sent 14 aid convoys to Ukraine, carrying thousands of tons of humanitarian aid to the ravaged regions.
Despite a ceasefire agreement formally reached in September, the truce was not observed and violence in the country's southeast escalated at the beginning of 2015.
On February, 12, arising out of 16-hour talks between the leaders of Russia, Ukraine, France and Germany in the Belarusian capital, Minsk, a new deal on Ukrainian reconciliation was signed, coming into force on February 15.