Antti Ilmari Lindtman (born 11 August 1982) is a Finnish politician who has served as leader of the Social Democratic Party (SDP) since September 2023.

Lindtman came out in support of the legislative reforms that arose from the Oulu child sexual exploitation scandal, where adult men that had come to Finland to seek asylum were discovered to have been grooming and subsequently sexually abusing and raping girls under the age of 15.

[2] Lindtman came in second in a vote to replace Social Democratic Party’s leader Antti Rinne in December 2019 after his resignation, narrowly losing to Transportation Minister Sanna Marin.

The speakers had been under the impression that the lists were the result of an internal agreement of the parliamentary group, whereas Lindtman had made the decision alone and without informing anyone else.

[5][6] In September 2023, when Antti Lindtman got elected chair of the SDP, a scandal broke out due to him in his adolescent years, posing near four other naked young adults, nude, wearing a pointed hat in the style of a christmas elf, covered by a balaclava and with an airsoft gun in hand.