EN
The aim of this paper is a statistical verification of seasonality phenomenon and calculation of seasonal factors of sold production of furniture in Poland. The work has been prepared on the basis of monthly data from Central Statistical Office for the years 2005-2014. The occurrence of seasonal fluctuations has been determined on the basis of statistical knowledge, using Kruskal-Wallis test. The increase of sold production of furniture occurs in March, September, October and November of each year as a result of seasonality. While, in July the value of sold production of furniture is lower by approximately 14% than the average sub-period, as the result of seasonality.