The purpose of this study is to examine the comparative study of Arabic and Hausa. This paper compared two languages because they have a lot of similarities in the view of the letters, phonemes and parts of speech. Arabic is one of the Semitic family, on the other hand Hausa is of the Chadic family in the classification of languages. But they are –in the broad sense- from Afroasiatic family. On the basis of the geographical site, Hausa was influenced by Arabic with the spread of Islam. To begin with, we found that there were the common 19 letters in two languages. But each of them has the unique 9 phonemes different from the other. As for the number of vowels, Hausa has more than Arabic. There are the singular, dual and plural conceptions in Arabic, but Hausa has the only singular and plural conceptions. In the classification of the gender, two languages accept commonly the masculine and feminine. Among the distinguished differences in two languages, Arabic has no possessive Pronouns. On the contrary, Hausa has them. In the case of verb, Hausa always should accompany the subject but Arabic verb has the hidden subject because the verb itself implies the subject. Also we found that that there were Arabic numbers in Hausa by Arabic for example 1 and 6 from the one and 20~90 from the ten units. Regarding to Adjective, it was proved that two languages share the grammatical features in the modification and the gender agreement; masculine and feminine.