Disclosed herein is a brake dust collector. The brake dust collector in accordance with the present embodiment may include: a pad module including a pair of brake pads that are respectively disposed on both sides of a disc rotating together with a wheel and are in close contact with or separated from the disc according to a forward and backward movement of a piston; a housing provided to cover a part of the disc by forming a pad module seat provided between a leading portion and a trailing portion and coupled to the pad module, and a filter module seat on an inner side of each of the leading portion and the trailing portion; and a filter module fixed to each of the filter module seats by a fastening member that penetrates and fastens from one side to the other side of the housing.