Jonas Sjöstedt is traveling to Wednesday's trial in Ankara together with Member of Parliament Ulrika Westerlund from the Green Party.
It is important to be there and observe the trial and that the Turkish authorities feel that they are being watched, says Sjöstedt.
The government will be represented by staff from the embassy in Ankara, who have applied to attend the trial.
Swedish journalist Joakim Medin has been imprisoned in Turkey for a month and was charged last week with "insulting the president" and "participating in a terrorist organization". The trial on Wednesday, April 30, concerns the charge of insulting the president.
Articles as evidence
According to the organization MLSA, which represents Medin, it is clear that the Swede is being put on trial for his journalistic activities, as the evidence consists only of his own articles, books, and social media posts.
Jonas Sjöstedt says that it is a political trial and that there is no basis whatsoever for the charges against Joakim Medin.
There are only references to ordinary journalistic work. There is no evidence.
It is also important that Turkey understands that arbitrary arrests of journalists harm Turkey's relations with the EU and Sweden, says Sjöstedt.
Our wish is that Turkey drops the charges and that Joakim can come home in good time before he becomes a father.
TU on site
Also, the CEO of Tidningsutgivarna, Johan Taubert, the CEO of Sveriges Tidskrifter, Kerstin Neld, and the Secretary-General of the Journalist Association, Karin Linder, are traveling to Ankara as observers.
"This is to be able to attend the trial and show the strong support Joakim Medin has", according to a press release.
Medin himself will not be present at the hearing in Ankara, but will participate via link from the high-security prison Marmara in Silivri outside Istanbul.
Journalist Joakim Medin traveled to Istanbul on assignment for the newspaper Dagens ETC on March 27 to report on widespread protests in the country, after Istanbul's mayor Ekrem Imamoglu was arrested earlier in the spring.
Medin, who has visited Turkey as a journalist several times but has not had problems with the authorities before, was arrested directly at the airport.
He was then transferred to the high-security prison Marmara in Silivri outside Istanbul, where many of Turkey's political prisoners are held or have been held. Medin is on the same ward as the imprisoned mayor Imamoglu.
On April 23, he was charged with terrorist crimes and insulting the president, which can result in a total of twelve years' imprisonment.