This article deals with the issue of pre -election polling and examines the methodological approaches used in pre -election polling in the Czech Republic. Aselection of Czech research agencies is presented and explored, as well as the recommendations of various professional associations. The core of this work examines and compares the methodological approaches used by the Czech agencies CVVM, ppm factum, Median and STEM. The aim of this article is to highlight the differences in the methodological approaches among the Czech agencies and to determine whether these differences could eventually affect the outcomes of pre -election polls., Kristýna Chábová., and Obsahuje seznam literatury