AbstractThe language must be understandable because it addresses the purpose and the message conveyed. Words have an important role in the development of language. Words become the basis of every existing linguistic element, for example from words to sentences, sentences to paragraphs or speech. This word is about morphology because it affects spelling, reading comprehension and vocabulary. To understand the meaning of vocabulary, language users must especially acquire knowledge of morphology inflectional morphemes. This study analyzes both morphemes that appear in the poetry "The Red Shoes' ' by Hans Christian Andersen. The purpose of research is to find the most inflectional morphemes that often appear in the works of Hans Christian Andersen's poetry and also develop the process of morphemes. This study applied a qualitative method. The result of this study revealed that from 142 words which contain inflectional morphemes, the most frequent type of morpheme that appeared in the poetry was plural using suffix -ed, which is found in 61 words. This research also found 7 types of inflectional process such as third-person singular, past tense, progressive, past participle, plural, comparative, and superlative. The purpose of this research is to increase students' vocabulary and become teaching materials for teaching.