The Canterbury Tales is a collection of stories written by Geoffrey Chaucer in the late 14th century. These stories are comprised of pilgrims who travel together from Southwark to a shrine located in Canterbury. The shrine which they aim to reach is of Saint Thomas Becket that is in Canterbury Cathedral. Stories in this collection are mostly written in verses. however, there also are some stories which are written in the form of prose. These tales are the narration of a contest in which those pilgrims travel together to attain the winning prize. Geoffrey Chaucer is also known as the father of English literature and The Canterbury Tales is considered as is one of the greatest works. This collection is based on an ironic critique on the English society of the contemporary times to The Canterbury Tales. This paper is aimed to propose that characters portrayed in The Canterbury Tales by Geoffrey Chaucer contain associations with the deadly vices either in a direct or the indirect sense. It also propose that common human beings are substantially vulnerable to the seven sins despite some are involved in holy actions in the light of The Canterbury Tales. The Catholic conception of seven deadly sins is prominently presented by Chaucer in the portrayal of each character. however, each character does not contain all of the sins identified as deadly vices. Beginning with the character of the knight who is presented as the possessor of a noble character as he acts as a generous and humble human being, the sin of wrath in a direct sense and pride in the indirect sense are associated with him (Chaucer 1233). The knight has fought several wars which depicts the deadly sin of wrath (Blackburn 336-337). In addition to this, the character of the knight is also represents pride (Blackburn 336-337) due to his dress quotes and dealings on indefinite circumstances with people. The knight is presented as a noble man in the tales. however, he has committed one of the seven deadly sins which illuminate the vulnerability of human beings to sins. The vulnerability to sin of noble individuals is not only prominent in the character of the knight but it is also illuminated in the character of the nun. The nun in it is involved in worldly manners along with earthly love which are the depictions of lust and pride (Blackburn 336-337). The nun in tales wipes her mouth after eating to concord with worldly manners and she cries for the pets which was not allowed for nuns to have in the 14th century English Society. It significantly signifies the association of human nature with the vulnerability of committing seven deadly sins (Chaucer 1233).