The redundancy theory of truth is normally considered to be a form of the deflationist theory of truth. Frege is sometimes counted as an advocate of the deflationist theory, because he emphasizes the redundancy of the truth predicate. In this paper, following Thomas Ricketts's interpretation, I will argue that this is a misunderstanding of Frege's view. Even if Frege is a deflationist, it cannot be because he accepts the redundancy thesis. Indeed, truth plays an indispensable role in Frege's picture of judgement and assertion. In light of his notion of judgement and assertion, what the redundancy of the truth predicate means to Frege will be clarified.