Miarolitic cavities are described from drill cores taken from rapakivi granite on Hästholmen, an island about 80 km east of Helsinki. The distribution of cavities between different textural types of rapakivi seems to favour the equigranular medium to coarse-grained and pyterlitic types. Cavities were found to be concentrated in the upper parts of the type in question. Minerals found in the cavities are: albitic plagioclase, quartz, haematite, pyrite and chlorite. The contents of the cavities differ in the joint fillings and the materials are not genetically related.