The Gospel of Judas is an interesting document, which completes our knowledge of (especially) the Sethianic gnosis. This is, on the one side, a contribution to the history of Christianity in the 2nd century, which shows a growing of the picture of Judas from Irenaeus, Haer. 1.31.1 to the Codex Tchacos. But on the other side, we can also better understand the historic Judas and (somehow) the presuppositions of the death of Jesus. All in all, the Gospel of Judas enables us (despite all ambivalence) to get a new and more differentiated impression of Judas in comparison to the canonical tradition.