To inexpensively provide a wire rod rolling mill capable of extending the range of size-free without increasing the equipment of a rolling mill, excellent in rolling quality such as dimensional precision and suppressing in investment amount.

In this wire rod rolling mill A which is provided with three 4-roll mills arranged in series shifting the reducing direction 45° by 45° and arranged in the last of a continuous finish rolling line Ls for wire rods, among three these 4-roll mills P1, P2, P3, by taking the mill P1 for the 1st pass as an individual motor drive system with a motor M1, the range of size-free is extended. Since the mills P2, P3 for the 2nd and 3rd passes are a common motor system with one motor M2, the number of motors is reduced, the interval between the mills is narrowed, and the rolling quality is improved.