A mudguard device adapted to conceal a cable which is disposed therein, said mudguard device being characterized by: a mudguard having a cover plate that extends along a curved line, and two opposite fixing plates, each of which is parallel to the curved line, extends from a bottom surface of said cover plate toward the other one of the fixing plates, has a bent end portion distal from said cover plate, and cooperates with said cover plate to define a first receiving space; and a cable holding member having two engaging portions that respectively and removably engage said first receiving spaces, a connecting portion that is connected between said engaging portions, that cooperates with said cover plate to define a second receiving space that is larger than said first receiving spaces, that is formed with a plurality of openings spaced apart from each other in a longitudinal direction parallel to the curved line, that is flexible in both the longitudinal direction and a transverse direction perpendicular to the longitudinal direction, and that has a flexibility in the longitudinal direction larger than that in the transverse direction, said second receiving space and said first receiving space being adapted for receiving the cable, and characterized in that a plurality of abutting portions are disposed on a side of said connecting portion facing said second receiving space, and have a flexibility in the transverse direction larger than that of said connecting portion in the transverse direction. a mudguard having a cover plate that extends along a curved line, and two opposite fixing plates, each of which is parallel to the curved line, extends from a bottom surface of said cover plate toward the other one of the fixing plates, has a bent end portion distal from said cover plate, and cooperates with said cover plate to define a first receiving space; and a cover plate that extends along a curved line, and two opposite fixing plates, each of which is parallel to the curved line, extends from a bottom surface of said cover plate toward the other one of the fixing plates, has a bent end portion distal from said cover plate, and cooperates with said cover plate to define a first receiving space; and a cable holding member having two engaging portions that respectively and removably engage said first receiving spaces, a connecting portion that is connected between said engaging portions, that cooperates with said cover plate to define a second receiving space that is larger than said first receiving spaces, that is formed with a plurality of openings spaced apart from each other in a longitudinal direction parallel to the curved line, that is flexible in both the longitudinal direction and a transverse direction perpendicular to the longitudinal direction, and that has a flexibility in the longitudinal direction larger than that in the transverse direction, said second receiving space and said first receiving space being adapted for receiving the cable, and two engaging portions that respectively and removably engage said first receiving spaces, a connecting portion that is connected between said engaging portions, that cooperates with said cover plate to define a second receiving space that is larger than said first receiving spaces, that is formed with a plurality of openings spaced apart from each other in a longitudinal direction parallel to the curved line, that is flexible in both the longitudinal direction and a transverse direction perpendicular to the longitudinal direction, and that has a flexibility in the longitudinal direction larger than that in the transverse direction, said second receiving space and said first receiving space being adapted for receiving the cable, and