The article deals with the analysis of the effect of legal form and size group on the capital structure of Czech agricultural businesses of legal entities. The effect of three legal forms and six size groups on the capital structure of the business is studied, expressed by way of three categories of indebtedness. The analysis of the effect of legal form and size group is performed by way of an analysis of the dispersion of dual classification. The panel data for the article were obtained from the Albertina database, provided by the company Soliditet, s.r.o. Specifically, data from accounting statements for the years 2004 – 2010 among agricultural businesses of legal entities were utilized. A total of 16075 businesses were the object of examination, which were divided up according to legal forms (joint-stock company (AS), cooperative (D) and limited liability company (SRO) and subsequently the relevant size group (6 size groups). A total of 18 groups of businesses resulted, whereby an average balance and profit and loss statement were drawn up for each group, on the basis of which the relevant calculations were conducted. The article is part of the grant project IGA 20121069 “Identification of the main determinants of the result of economic activity of agricultural businesses of legal entities and the determination of their specifics” and of the institutional research intentions MSM 6046070906 „Economics sources of Czech agriculture and their efficient use in the context of multifunctional agri-food systems“.