Abstract: A shock absorbing floor brush assembly for attachment with high-speed floor cleaning machines is provided having a rigid brush disk movably mounted on a shock absorbing hub so that the brush disk rotates with a floating action. The shock absorbing hub is of smaller diameter than the brush disk and has a drive disk with a conventional attachment clutch plate mounted on its top side and fasteners surrounded by resilient material extending from its underside. These fasteners hold the rigid brush disk, when stationary, in parallel relationship with the drive disk but permit the brush disk to move upward during use. The particular construction of the floor brush assembly enables the resilient material to absorb the upward and torque shocks encountered when cleaning a floor and to return the brush disk to its parallel relationship with the drive disk without transmitting the shocks to the floor cleaning machine and its operator.