This study aims at describing syntactic behaviour of congruence and rection in Arabic by examining the syntactic element attached to them. This study also aims at determining types of congruence and rection in Arabic that have not been revealed so far.Syntactic element that is involved in the process of congruence and rection is the secondary category such as person, number, gender, defineteness, case, mood, and aspect. Both of congruence and rection focuse on relation between constituents in one construction. The two term can be distinguished by looking at the category involved.Congruence focuses on the relation between constituents in one construction that is marked by the appearance of the same category, for example, the category of person, number, and gender play an important role in the relation between a subject and its verbal predicate, while rection focuses on relation that is marked by the appearance of a certain category resulted from the relation between one constituent and another example, accusative case in the objective function is a result of relation between an object and its predicate.This study concludes that in Arabic, congruence and rection can be found at the clause and phrase level.