A mounting bracket and dampening assembly for mounting a heavy bag, a first portion of the mounting bracket mounted horizontally in relation to mounting surface, a second portion of the mounting bracket depending downwardly forming a support surface for a securing means for supporting the heavy bag in combination with a dampening means in the form of upper and lower bushings in combination with a rod and spring assembly to lessen the transmission of stress, shock and vibration and to reduce the motion, both lateral and vertical, of the heavy bag.