Provided is a clip for fixing a mat on a carpet of a vehicle, the clip including: a lower plate disposed on a bottom surface of the carpet, and includes an insert groove on a front portion; an upper plate disposed on a top surface of the carpet, includes a hook coupled to the inserted groove in the front portion, and includes a projection at a top to which the mat is inserted; a pillar penetrating through a hole of the carpet, and connects a rear portion of the lower plate and a rear portion of the upper plate in upward and downward; a first hook formed on a bottom surface of the rear portion of the upper plate corresponding to an inner side of a front portion of the pillar; and a second hook formed on a top surface of the rear portion of the lower plate corresponding to the inner side of the front portion of the pillar, and hooked to the first hook through the hole, when the lower plate moves upward toward the upper plate based on the pillar. According to the clip, a rear portion of the clip is coupled firstly on the carpet by combining the first and second hooks, and then a front portion of the clip is coupled secondly on the carpet by combining the hook and the insert groove. Thus, fixability of the clip to the carpet is reinforced, and movement of the mat is effectively prevented.