There is provided a pneumatic tire with a reinforcing part which is mounted on a tire wheel, the pneumatic tire including: a tread having a groove that is formed in a circumferential direction of the tire wheel as being recessed toward a central axis of the tire wheel, a kerf that is formed to intersect the groove as being recessed toward the central axis of the tire wheel, and one or more blocks that are formed between the groove and the kerf and come into contact with a road surface; a shoulder formed at a side of the tread; and a reinforcing part inserted into the groove formed between the one or more blocks. The reinforcing part reduces noise produced due to contact with the road surface by being bent one or more times.