Finland ends nuclear weapons ban as parliament approves major NATO-aligned defense shift

Finland’s parliament has approved legislation that removes the country’s long-standing legal ban on nuclear weapons, clearing the way for potential alignment with NATO’s nuclear deterrence framework, according to reporting by Euronews.

The decision marks one of the most significant shifts in Finnish defense policy since the country joined NATO in 2023 following Russia’s full-scale invasion of Ukraine.

Legal framework rewritten for NATO integration

According to Euronews, the approved bill allows nuclear weapons to be transported, stored, or potentially stationed in Finland if required for defense cooperation within NATO.

It also removes restrictions set out in Finland’s Nuclear Energy Act from the 1980s, which had prohibited the import, production, possession, and deployment of nuclear explosives.

Lawmakers framed the change as necessary to ensure Finland can fully participate in NATO’s deterrence architecture, which relies on the nuclear capabilities of allied states.

Defense Minister Antti Häkkänen said the proposal strengthens national defense and enables “the full use of NATO’s nuclear deterrent,” according to Euronews.

Vote reflects security shift after 2022 invasion

Finland abandoned decades of military non-alignment in 2023, a move driven by Russia’s invasion of Ukraine and a broader reassessment of security across Northern Europe.

The vote highlights how that shift is now extending into domestic legal structures governing defence policy.

The bill passed with 125 votes in favor, 61 against, and 13 abstentions, and now requires presidential approval.

Political debate over nuclear reversal

The change has sparked domestic debate, with opposition figures criticizing the reversal of Finland’s long-standing prohibition on nuclear weapons.

While the government argues the move is about deterrence and alliance integration, critics have raised concerns about abandoning a key pillar of Finland’s previous security doctrine.

Prime Minister Petteri Orpo has also signaled interest in closer European nuclear deterrence cooperation, including a French-led initiative, though no formal commitments have been made.

The reform comes as NATO members in Northern Europe continue to deepen defense coordination in response to Russia’s war in Ukraine, including expanded planning around nuclear deterrence and regional security integration.