Kannelmäki (Swedish: Gamlas, Helsinki slang: Kantsu) is a sub-neighbourhood of the neighbourhood of Kaarela in Helsinki, Finland. Kannelmäki is located a bit more than ten kilometres from the centre of Helsinki, and is bounded by Kehä I in the south, Hämeenlinnanväylä in the east, and the Mätäjoki river in the west and north. In early 2006, Kannelmäki had 12 488 inhabitants.
The streets in Kannelmäki are named after music and villages in Ostrobothnia. The area was originally named Vanhainen - Gamlas, which comes from the village of Gamlas originally located at the site, and its Finnish translation. Because of the wishes of the local inhabitants, the name was changed to Kannelmäki - Gamlas in 1959. The singular church of Kannelmäki was completed in 1968.
Services in Kannelmäki are concentrated in the shopping centre designed by Erkki Karvinen and opened in 1959, the Prisma hypermarket building (originally opened in 1973 as Eka-Market, then as Maxi) and the surroundings of the Kannelmäki railway station. Prisma is designed to be expanded into a larger shopping centre in 2012, designed to contain a food market, a pharmacy, Alko and special shops, possibly also containing wellness centres such as a gym. In February 2007, the Prisma facilities were moved to the two-level part of the building, and the dismantling of the old building started in summer 2007. The building of the new shopping centre will increase Kannelmäki's role as a prominent centre of western Helsinki.