Matthew 26 is the 26th chapter of the Gospel of Matthew, part of the New Testament of the Christian Bible. This chapter covers the beginning of the Passion of Jesus narrative, which continues to Matthew 28; it contains the narratives of the Jewish leaders' plot to kill Jesus, Judas Iscariot's agreement to betray Jesus to Caiphas, the Last Supper with the Twelve Apostles and institution of the Eucharist, the Agony in the Garden of Gethsemane and the subsequent vindication of Jesus' predictions, of betrayal by one of the twelve Apostles, and that he will, in the Denial of Peter, be disowned by his closest follower, Saint Peter.

Joseph ben Caiaphas, known simply as Caiaphas in the New Testament, was the Jewish high priest during the years of Jesus' ministry, according to Josephus. The Gospels of Matthew, Luke and John indicate he was an organizer of the plot to kill Jesus. He famously presided over the Sanhedrin trial of Jesus. The primary sources for Caiaphas' life are the New Testament, and the writings of Josephus. The latter records he was made high priest by the Roman procurator Valerius Gratus after Simon ben Camithus had been deposed.