This study aims to analyze political implications of the portrayal of the Sir Lancelot and Queen Guenivere's love in Malory's Le Morte Darthur. Their love is following a typical form of the courtly love which contains adulterous relationship between a knight and a lady. In this point of view, Lancelot and Guenivere's adulterous relationship as a matter of individual love could be acceptable. However, in Malory's work, their adulterous love makes complicated political problems in the Arthurian society since the divulgence of their relationship provides the most important cause for the breakup of the Round table which is a symbol of the male-centered bond in the Arthurian society, and finally the dissolution of the Arthurian kingdom itself. On that ground, Lancelot and Guenivere's relationship becomes one which can not be acceptable in the work. Ironically, however, their adulterous relationship is tolerated and reduced by King Arthur who is a husband of Guenivere, other male characters, and by Malory himself. This essay argues that it is attributed to the political power game among male characters including King Arthur and his knights and Guenivere's political role as a queen. It also argues that Malory portraits Queen Guenivere as not a lady who is just tied to a secular love, but as a leader who has the political power and Christian faith.