Abstract: A mud flap holder assembly adapted to be secured to a vehicle in the proximity of the rear of a tire or wheel which is to be serviced by the mud flap, the assembly comprising a first bar adapted to be secured to the vehicle, and a second bar secured to the first bar by clamp members whereby the second bar may be clamped against the first bar for clamping the mud flap therebetween and readily released from the clamped position for removal or replacement of the mud flap from the assembly, arm members extend outwardly from one of the bar members for limiting the movement of the clamped mud flap in a direction away from the outer periphery of the tire or wheel thus assuring an efficient operation of the mud flap as the vehicle moves over a roadway, or the like.