Rail pads are a part of rail fastening and have an important role for track strain. The main observed characteristics are a static stiffness and a dynamic stiffness of rail pad. At the moment there are two standards for determining static stiffness - the national document General technical conditions (Obecné technické podmínky - OTP) and the european norm ČSN EN 13 146-9. However, the metodology of static stiffness measuring is different. It means different values of rail pads static stiffness. In the OTP there are required values of static stiffneses for baseplate and baseplateless rail fastening. These requirements can't be applied on the static stiffness set by ČSN EN due to different measurement methodology. The aim of this thesis is to measure static stiffness of rail pads according to both methodologies and to check relation between the methodologies. The thesis proceeds from requirements of Správa železniční dopravní cesty - the national organization.