Many languages have at least two structural types of constituent questions: one is structurally parallel to the argument focus structures (for example, in some languages constituent questions are structured as cleft sentences), the other one does not show such parallelism. This paper is aimed at figuring out what factors are determining the structural type of the constituent question in several languages of the North Caucasus. These factors include the semantics of the question, the syntactic position of the questioned constituent and the type of the main predicate. Surprisingly, in Maninka (Mande), where the basic structures of constituent questions and argument focus sentences are essentially different, the factors determining the structural type of a constituent question are very much alike.