This thesis examines the concept of righteousness in the Gospel of Matthew. The research explores the literal meanings and theological functions of the noun ?righteousness? and the adjective ?righteous? through a descriptiveand comparative study of all the pericopes which include these words. The research also includes relevant information about the historical context of the text as well as the central theological themes which relate to the subject.In the research on the literal meanings, it seems that both words primarily occur in ethical teaching and that the concept of righteousness in Matthew is closely related to humanconduct (e.g. Matt 5:20; 6:1).