To suppress longitudinal cracks and carry out casting smoothly when casting a steel with C content of 0.10-0.14 mass% by a vertical bending type slab continuous casting machine 1.

In a continuous casting method for casting a steel with C content of 0.10-0.14 mass% by a vertical bending type slab continuous casting machine 1, water quantity density of a wide surface of a slab is made to be 3.5-7.9 (m³/h/m²) and mold alignment that regulates positional relation between a mold 5 and a roll is made to be -0.6 mm≤a≤-0.01 mm and -0.39 mm≤[(a-b)/2]≤0.01 mm when cooling the wide surface of the slab just below the mold 5.