Disclosed is an airbag door including: a panel which has tear lines, in which the tear lines include: a first tear line which is extended in a left and right direction of the panel; second tear lines which are extended from left and right end portions of the first tear line in an up and down direction of the panel, respectively; and third tear lines which are extended from upper and lower end portions of the second tear lines toward corners of the panel, respectively, thereby preventing an airbag from being torn by broken parts of the panel of the airbag door when the airbag is deployed.