Putin sent tens of thousands of troops into Ukraine in 2022, triggering the biggest confrontation between Moscow and the West since the depths of the Cold War.
"We agree with the proposals to cease hostilities," Putin told reporters at a news conference in the Kremlin on Thursday, following talks with Belarusian President Alexander Lukashenko.
"But we proceed from the fact that this cessation should be such that it would lead to long-term peace and would eliminate the original causes of this crisis."
Russian forces have been advancing since mid-2024 and control nearly a fifth of Ukraine's territory, three years into a war that US President Donald Trump has said he will halt.
Trump had said in the White House on Wednesday that he hoped the Kremlin would agree to the US proposal for a 30-day ceasefire that Ukraine said it would support, to end what Trump called the "bloodbath".
Putin thanked Trump for his efforts to end the war.
"The idea itself is correct, and we certainly support it," Putin said. "But there are issues that we need to discuss. And I think we need to talk to our American colleagues as well."
Putin said he might call Trump to discuss the issue. "We support the idea of ending this conflict by peaceful means."
Putin on Wednesday donned green camouflage uniform to visit a command post in the Kursk region of western Russia where Ukraine is set to lose its foothold after a major offensive by Russian forces.
