The deputy joins a growing list of public figures who have broken from the official line to voice criticism of the authorities.
Late last month, Renat Suleymanov, a State Duma deputy from the same party, called for the “earliest possible end” to the war, saying the economy could not “withstand” its continuation.
In March, Ilya Remeslo, formerly a staunch Kremlin loyalist, turned against Putin, branding the Russian president “a war criminal and a thief”, and calling for him to be put on trial.
Discontent with the authorities has simmered in the past few months, linked to sweeping internet outages, sluggish progress on the battlefield and long-range Ukrainian strikes that have penetrated the heart of Russia’s two biggest cities.
This week, it was reported that the state-controlled Russian Public Opinion Research Centre would stop publishing Putin’s “open” trust rating as it plummeted to the lowest level since the start of the invasion.
Only 29.5 per cent of Russians named their president as one of the politicians they trusted in early April, before the survey was mysteriously discontinued.