A ball bearing cage includes a plurality of ball pockets, wherein each ball pocket serves for receiving a ball, wherein each ball pocket (12, 22) has a width (B) in axial direction of the ball bearing cage (10, 20) and a length in circumferential direction of the ball bearing cage (10, 20), with the width (B) being slightly greater than a diameter of the ball (30), wherein the length is greater than the width (B) of the ball pocket (12,22) at least at an outer circumference (UA) of the ball bearing cage (10), and the length (LA) of the ball pocket (12,22) at the outer circumference (UA) of the ball bearing cage (10) is greater than the length (LI) of the ball pocket (12,22) at the inner circumference (UI) of the ball bearing cage (10,20).