The building began life as the parish church of Kinnarumma, a timber-built structure erected in 1690-1691 that was typical of church architecture of its period in the region. It originally had a tower, but this was demolished in the late 1860s and replaced with a built-in bell turret.
When the parish of Kinnarumma built a new church in 1907, the old timber church was handed over to a local heritage society, De Sju Häradernas Kulturhistoriska Förening. It was dismantled in 1912 and re-erected in Borås, where it stood ready for the opening of the national-romantic open-air museum in Ramnaparken in 1914. The altar cabinet and pulpit travelled with the building, but the attached bell turret did not; a freestanding bell tower and a covered lychgate from Öra parish in Gäsene were installed instead, while the pews came from Vänga church.
Initially intended purely as a church museum, the building later resumed use for worship, baptisms and weddings, and was reconsecrated in 1930 under its present name, Ramnakyrkan.
The timber walls and steep roof are covered with wooden shingles, the walls painted red and the roof tarred. When the church was rebuilt in Borås, the north wall was restored without windows, as in the original. Much of the interior furnishing dates from the 17th and 18th centuries, giving the whole building a strong sense of an earlier age.
The unusually flat board ceiling was first painted in 1706 by Nicklas Berg, then overpainted by Ditlof Ross in 1752-1753; traces of Berg's earlier work can still be glimpsed beneath. Ross is also credited with painting the gallery front with figures of the apostles, possibly assisted by his stepson. A 19th-century restoration covered the walls with canvas and whitewashed the ceiling, destroying the original wall paintings, but the decorative ceiling paintings were uncovered again in 1930.
Ramnakyrkan today displays a number of medieval sculptures and other furnishings brought in from various churches across the Sjuhäradsbygden area, alongside a poor box outside the low stone wall, itself a copy of the original still standing at Kinnarumma's newer church.