The invention provides a rolling method for a flat-rolled metal material and a rolling apparatus for the method each capable of stably producing a flat-rolled metal material free from camber or having an extremely light camber. The control circuit generates a reset signal, and an operation mode signal. The end plates have a first passage inlet opening only to the first passage, a first passage outlet opening only to the first passage, a second passage inlet opening only to the second passage and a second passage outlet opening only to the second passage. Then, a target 88 at which the needle 10 is to be inserted, a direction, a distance 12-A, an angle 12-B of the needle with respect to the blood vessel, and the like are displayed in the synthesized image, so that the positional relationship between the blood vessel and the needle 10 is recognized in a three-dimensional manner. The recesses can be small enough, interspersed with non-etched areas of the contact surface, that structural integrity of the coupling between the parts is still maintained.