As the manufacturing and use of vehicles are increasing globally, the disposal and recycling of waste tire have become a major environmental issue when they are out of service life. One of the potential recycling processes is to turn the waste tire into a useful composite material that may have domestic and industrial applications where hard materials are required. In the present study, hardness of novel Waste Tire Rubber-Polypropylene (WTR-PP) composite is evaluated using analog Rockwell hardness tester. Since WTR is a soft material and elastic in nature, the addition of WTR in composite materials affects the properties of the resulting novel WTR-PP composite including the hardness. It is observed from the test that the hardness of the WTR-PP composites decreases with the increase of WTR % due to lower hardness of WTR as compared to PP. Results reveal that upon addition of 20%, 40%, 60% and 80% WTR in the composite the hardness of composite decreased by 42.5%, 61.8%, 84.09% and 93.18% respectively.