In the design of Steel Reinforced Concrete Beam, the examination of the crack is one of main examination items in the serviceability limit state. However, a concrete evaluation to the width of the crack is not done in the present railway structure design. Then, we experimented to examine the design method for the bend crack of Steel Reinforced Concrete Beam, showed the maximum crack interval of Steel Reinforced Concrete Beam and discussed the method of evaluating the width of the maximum crack.