There are a few, but you'll have to hunt them out. Two personal favorites cribbed from Wikitravel:

* Kahvila Suomi, Pursimiehenkatu 12, tel. +358-9-657422. Huge portions of no-nonsense Finnish food like meatballs and mashed potatoes, which explains the dock workers that crowd here at lunchtime. The Japanese tourists, on the other hand, come because the cult hit movie ''Kamome Shokudo'' was filmed here! Most mains under 10e, including salad bar, drink and coffee. Open Mon-Fri 7 AM to 6 PM.
* VPK, Albertinkatu 29, web. Run by the Volunteer Fire Brigade, this restaurant serves a daily changing buffet of hearty Finnish fare in a cafeteria straight from the 1950s, complete with grim portraits of moustached Hosemasters staring down at you. Pea soup and pancakes on Thursday are particularly popular. 7.70e per head, open weekdays from 11 AM to 3 PM only.