A roller bearing cage includes a first side ring, a second side ring and a plurality of axially-extending bridges connecting the side rings. A pocket for retaining a roller body is defined between the side rings and each two adjacent bridges. The two side rings and the bridges are integrally formed in one-piece. Reinforcement rings are disposed on one or both outer axial sides of the side rings. One or more connecting elements extend axially through the respective bridges, side rings and reinforcement rings. At least one axial end of the connecting element(s) directly or indirectly affixes the reinforcement ring(s) to the side ring(s).