Antti Juhani Rinne (Finnish pronunciation: [ˈɑntːi ˈjuhɑni ˈrinːe]; born 3 November 1962) is a Finnish politician who served as speaker of the Parliament of Finland from April to June 2019 and Prime Minister of Finland from June to December 2019. He led the Social Democratic Party from 2014 until 2020. In August 2023, he was hired as the General Secretary of SAMAK for a three-year term.

A lawyer by profession, Rinne holds a Candidate of Law degree from the University of Helsinki. He served as chair of the Union of Private Sector Professionals (ERTO) from 2002 to 2005, the Union of Salaried Employees from 2005 to 2010, as well as Trade Union Pro from 2010 to 2014.

Rinne was elected chairman of the Social Democratic Party of Finland (SDP) on 9 May 2014, defeating Jutta Urpilainen. In 2017, he was elected for a second term as chair of the Social Democratic Party.

He was Minister of Finance and Deputy Prime Minister of Finland between 2014 and 2015 and has been a Member of Parliament since 2015 until 2023. In the 2019 parliamentary election, Rinne led the Social Democrats to victory and served as Speaker of Parliament before being appointed Prime Minister on 6 June 2019.

Rinne and his cabinet resigned on 3 December 2019, when the Centre Party withdrew its support due to the 2019 Finnish postal strike. President Sauli Niinistö asked him to continue with a caretaker government until a new government was appointed. On 10 December 2019, Sanna Marin was appointed as Prime Minister of Finland.

On 11 December 2019, Rinne was elected as the First Deputy Speaker of the Parliament, replacing Tuula Haatainen, who was then named as the Minister of Employment in the Marin Cabinet.

Rinne ran in the 2023 Finnish parliamentary election, but was not re-elected. In August 2023, Rinne was hired as the General Secretary of SAMAK for a three-year term.

In 2017, Antti Rinne provoked some controversy by encouraging Finns to reproduce.