Tiedonantaja ("Informant") is a Finnish leftist monthly newspaper published in Helsinki, Finland. It is the party organ of the new Communist Party of Finland (SKP).

Tiedonantaja's current editor-in-chief is Petra Packalén^[1] who was preceded by Marko Korvela (2012-2018) and Erkki Susi (1983-2012).

Tiedonantaja was founded in 1968 as the paper of the taistoist minority faction of the Communist Party of Finland^[2] until the opposition was expelled in the mid-1980s.^{[clarification needed]} During the 1970s and in the first half of the 1980s Kansan Uutiset represented the moderates in the party whereas Tiedonantaja was the organ of the doctrinaire faction.^[3] In the late 1980s, the paper was also the organ of the electoral front, Democratic Alternative.

Tiedonantaja was first published irregularly by the Uusimaa district organisation of the SKP. It became a nationwide publication after other taistoist districts joined, and in 1970 the paper began to be published on a weekly basis. In 1972, Tiedonantaja was published three times a week and from 1973 onwards, four times a week. The paper reduced back to its weekly format in 1990. Tiedonantaja became a monthly newspaper in 2018.

In the 1970s, Tiedonantaja had a circulation of about 30,000. Its circulation was 6,000 copies in 2010.^[4] Over 50,000 people sent May Day and new year's greetings, which were published in the special editions.