To provide a wire rod straightening apparatus where the pushing-up quantity of two straightening rolls can be simultaneously regulated.

The wire rod straightening apparatus is provided with: a first straightening mechanism composed of two first pressurizing rolls and a first straightening roll for straightening a first thermal spraying wire rod; and a second straightening mechanism composed of two second pressurizing rolls and a second straightening roll for straightening a second thermal spraying wire rod. The apparatus is further provided with: a pressurizing roll supporting member in which the two first pressurizing rolls are fitted to either side face and the two second pressurizing rolls are fitted to the other side face; a straightening roll supporting member provided at the lower part of the pressurizing roll supporting member; a slide member in which the first straightening roll is fitted to either side face and the second straightening roll is fitted to the other side face; and a straightening roll slide mechanism for making the slide member slide to the straightening roll supporting member. As a result, one regulation bolt is rotated, and the pushing-up quantity of the two straightening rolls can be regulated.