[en] The present study summarizes laboratory measurements of Olkiluoto rocks carried out at Geological Survey of Finland during 1994-2010. The complete data set comprises 392 drill core samples from 12 drill holes representing the planned repository volume at depths of about 400-500 m. The majority of the samples represent veined gneiss, pegmatitic granite, tonalitic-trondhjemitic gneiss (56 - 216 samples/rock type), whereas diatexitic gneiss, mica gneiss, K-feldspar porphyry and quartzitic gneiss are in minority (1 - 20 samples/rock type). Average thermal conductivity (at 25 deg C) of all samples is 2.91 Wm^-1K^-1, and the averages of main rock types (veined gneiss, tonalitic-granodioritic-granitic gneiss, diatexitic gneiss, mica gneiss and pegmatitic granite) fall within 2.66 - 3.20 Wm^-1K^-1. The standard deviations of conductivity are 0.4 - 0.6 Wm^-1K^-1, and the histograms of main rock types overlap. The overlapping, as well as the values of standard deviations reflects geological variability in the migmatitic formation. Highest average conductivities are related to pegmatitic granite and lowest to mica gneiss. Average specific heat capacity (at 25 deg C) of all samples is 712 J kg^-1 K^-1. Highest specific heat capacity averages were observed for veined gneiss and mica gneiss, and lowest for pegmatitic granite, respectively. The standard deviations are relatively small in the range of 19-41 J kg^-1 K^-1. Diffusivity was calculated from measured values of conductivity, specific heat capacity and density. Average diffusivity is 1.47 X 10^-6 m²s^-1, and the averages of rock types are within 1.34 - 1.75 x 10^-6 m²s^-1. Highest values are related to pegmatitic granite, and lowest values to mica gneiss. The standard deviations are in the range of 0.1 - 0.3 x 10^-6 m²s^-1. The histograms of diffusivity overlap, and the differences between rock types are relatively small. Thermal properties show weak positive correlation with density for pegmatitic granite, and weak negative correlations for tonalitic-granodioritic-granitic gneiss, veined gneiss and mica gneiss. Other rock types do not show correlation with density in the present data set, but it may be related to low numbers of samples. Thermal conductivity is anisotropic and dependent on the core angle between direction of conductivity measurement and rock foliation (or gneissic banding) of tonaliticgranodioritic- granitic gneiss and veined gneiss. No correlation was observed for the other rock types. Lowest conductivities are measured perpendicular to foliation (average about 2.4 Wm2-¹K^-1) and highest values along foliation (average about 3.4 Wm^-1K^-1). The average thermal properties of the repository rocks at 100 deg C are predicted as follows: conductivity 2.72 Wm^-1K^-1, specific heat capacity 824 J kg^-1 K^-1 and diffusivity 1.20 x 10^-6 m²s^-1. (orig.)