English Abstract: Documentary texts — documents of daily life like letters, contracts, accounts etc. — are one of the quantitatively most underrepresented text corpora in grammars of Middle Egyptian. Although publications dealing with special questions rely quite often on documentary texts these studies have in most cases a limited scope and they do not address observed phenomena as characteristics of documentary texts. The work presented here wants to close these gaps pursuing three goals: first, the collection and documentation of all grammatical and scribal phenomena; second, the identification of the characteristic features of the lowest text register "documentary texts" including both a synchronic comparison with the "Sprachstufe" Middle Egyptian as drawn in grammars and a general linguistic dating within the language development. Third, this work is designed to serve as a grammatical repertory and collection of examples for future research in linguistics of Middle Egyptian. The volume consists of the following main parts: (1) Introduction and sources (§ 1-13); (2) Scribal conventions and developments (§ 14-28); (3) Word morphology and syntax (§ 29-338); (4) Clause syntax and additions (negations, tense and mood system, direct and reported speech) (§ 339-404); (5) A large appendix giving an overview over the epistolary formulae of the Middle Kingdom.