Sliding bearing and method of manufacturing the same

A method of manufacturing a sliding bearing including a cylindrical member or two semicylindrical members combined to be cylindrical, the cylindrical member or the semicylindrical members including a solid back metal and a lining layer provided to cover an inner circumferential surface of the back metal so that the lining layer serves as a sliding surface, the lining layer including a crowning formed of a sloped surface having a diameter gradually increasing towards an end surface from a center portion in an axial direction on at least one of both axial ends of the sliding surface, the crowning including a first crowning formed of a sloped surface on the lining layer and a second crowning formed on a sloped surface on a part of the back metal which corresponds to the first crowning, said method comprising the steps of:

• cutting a plate-shaped material including a solid back metal and a lining layer covering a surface of the back metal to have a predetermined length;
• and
• shaping the plate-shaped material that is cut to have the predetermined length to be cylindrical or semicylindrical as a whole so that the lining layer serves as an inner circumferential surface and forming a sloped surface having a diameter increasing from a center portion toward an end surface in an axial direction on at least one of both ends of the inner circumferential surface in the axial direction.