Interrogative construction in Yoruba has been widely discussed by the scholars of Yoruba. Our observation is that though the structures of interrogative construction in Yoruba language and Èkìtì dialect are identical. The only area of difference is that question markers in interrogative construction in Èkìtì are fewer than what we have in Yoruba language. This paper examines the mechanism for derivation of interrogative construction in Èkìti dialect. It also claims that interrogative marker is not completely absent in the dialects of Yoruba. Considering what operates in Èkìtì dialect of Yoruba.