The purpose of this paper is to apply `Carnival` of Mikhail Bakhtin in analyzing Herold Pinter`s The Birthday Party and A kind of Alaska. His plays are noted for their uses of understatement and silence to convey the substance of a character`s thought. All Pinter`s plays hold dialogues of common people, ambiguous dictions of characters and unstable unfinalizability which break the order of traditional play and create the remarkable `grotesque` . Especially, the abnormal family relation in two plays is an element of Carnival which challenges the order of patriarchal system. Besides, dialogues of The Birthday Party aim to make spectators laugh with the uses of absurd games and effects of festivities of party with characters` ridiculous actions and happenings in the party. All of them are the elements of Carnival. Pinter`s plays have the elements of Carnival basically. He converts the new birth of characters from the party(a modern mode of Carnival) in his plays. His plays as `the theatre of the absurd` express original isolation and anxiety beneath the inside of human being. But simultaneously they these two plays can make us feel liberated from the rigid and authoritative system. The problem of human crisis, which is the everlasting theme of Pinter`s play, shows not only a tragic nature but also a deconstructive nature which implies a new birth and liberation. In this way, the characteristics and effects of Carnival can be discovered in the process of making festivities with carnivalistic and grotesque characters and actions.