<p>The method for manufacturing steel sheet comprises the steps of: forming a sheet bar; forming a steel strip; primary-cooling; air-cooling; secondary-cooling; and coiling. The sheet bar is finish-rolled at finish temperatures of (Ar3 transformation point - 20 DEG C) or more. The primary cooling cools the finish-rolled steel strip at cooling speeds of more than 120 DEG C /sec down to the temperatures ranging from 500 to 800 DEG C. <IMAGE></p>
